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RCHS Rev. 06/2011 Geometry Unit One Length of Unit KY Common Core Academic Standards 4 Weeks Cluster – Experiment with transformations in the plane. G.CO.1 Know precise definitions of angle, circle, perpendicular line, parallel line, and line segment based on the undefined notions of a point, line, distance along a line and distance around a circular arc. Rowan County Senior High School 2010-2011 Congruence Vocabulary/Learning Targets Vocabulary: Angle, circle, perpendicular line, parallel line, undefined terms, arc, ray, vertex, equidistant, intersect, right angle, line segment, point, line distance, transformations, Functions, translation, horizontal stretch, rotation, reflection, dilation, image, preimage, rigid motion, Input, output, coordinates, angle measure Unit Learning targets Students will be able to: G.CO.2 Represent transformations in the plane using, e.g., transparencies and geometry software; describe transformations as functions that take points in the plane as inputs and give other points as outputs. Compare transformations that preserve distance and angle to those that do not(e.g. translation versus horizontal stretch) A Activities/Assessments/ Resources Word wall Think-Pair Share Anticipation Guides Admit/exit slips Jigsaw Double entry organizer Note-taking Guide Win-GEOM Geogebra Smartboard interactions Power point presentations Sage and Scribe I will describe the undefined terms: point, line, and distance alone a line in a plane. I will define perpendicular lines, parallel lines, line segments, and angles. I will define circle and the distance around a circular arc. I will represent transformations in the plane using, e.g., transparencies and geometry software. I will write functions to represent transformations. I will compare transformations that preserve distance and angle to those that do not(e.g., translation versus horizontal stretch) I will describe the different types of transformations including translations, reflections, rotations, and dilations. Page 1 RCHS Rev. 06/2011 Cluster – Experiment with transformations in the plane. Geometry Vocabulary: Rectangle, parallelogram, trapezoid, isosceles trapezoid, regular polygon, rotational symmetry, reflection symmetry, mapped onto G.CO.3 Given a rectangle, parallelogram, trapezoid, or regular polygon, describe the rotations and reflections that carry it onto itself. Rotation, reflection, translation, perpendicular bisector, line segment, preimage, image, parallel lines, angle, center of rotation, map, figure, transformation, composition. G.CO.5 Given a geometric figure and a rotation, reflection or translation, draw the transformed figure using, e.g. graph paper, tracing paper or geometry software. Specify a sequence of transformations that will carry a given figure onto another. Rowan County Senior High School 2010-2011 Word wall Think-Pair Share Anticipation Guides Admit/exit slips Jigsaw Double entry organizer Note-taking Guide Win-GEOM Geogebra Smartboard interactions Power point presentations Sage and Scribe Unit Learning targets Students will be able to: G.CO.4 Develop definitions of rotations, reflections and translations in terms of angles, circles, perpendicular lines, parallel lines and line segments. A I will describe the rotations and/or reflections that carry it onto itself when given a rectangle. I can calculate the number of lines of reflection symmetry and the degree of rotational symmetry of any regular polygon. I will develop definitions of rotations, reflections and translations in terms of angles, circles, perpendicular lines, parallel lines, and line segments. I can draw a specific transformation when given a geometric figure and a rotation, reflection, or translation. I can predict and verify the sequence of transformations (a composition) that will map a figure onto another. Page 2 RCHS Rev. 06/2011 Cluster – Understanding congruence in terms of rigid motion. G.CO.6 Use geometric descriptions of rigid motions to transform figures and to predict the effect of a given rigid motion on a given figure; given two figures, use the definition of congruence in terms of rigid motions to decide if they are congruent. Geometry Vocabulary: Congruence, composition, rigid motions, map, reflection, rotation, translation, transformation, angle measure, distance Rigid motions, reflection, rotation, translation, distance, angle measure, congruent, composition, map, figure, corresponding sides, corresponding angles, triangle Rowan County Senior High School 2010-2011 Word wall Think-Pair Share Anticipation Guides Admit/exit slips Jigsaw Double entry organizer Note-taking Guide Win-GEOM Geogebra Smartboard interactions Power point presentations Sage and Scribe Unit Learning targets Students will be able to: G.CO.7 Use the definition of congruence in terms of rigid motions to show that two triangles are congruent if and only if corresponding pairs of sides and corresponding pairs of angles are congruent. A I can define rigid motions as reflections, rotations, translations, and combinations of these, all of which preserve distance and angle measure. I can define congruent figures as figures that have the same shape and size and state that a composition of rigid motions will map one congruent figure onto the other. I can predict the composition of transformations that will map a figure onto a congruent figure. I can determine if two figures are congruent by determining if rigid motions will turn one figure into the other. I can identify corresponding sides and corresponding angles of congruent triangles. I can explain that in a pair of congruent triangles, corresponding sides are congruent(distance is preserved) and corresponding angles are congruent(angle measure is preserved). I can demonstrate that when distance is preserved(corresponding sides are congruent) and angle measure is preserved(corresponding angles are congruent) the triangles must also be congruent. Page 3 RCHS Rev. 06/2011 ClusterUnderstand congruence in terms of rigid motion. Cluster – Prove geometric theorems Geometry Vocabulary: G.CO.8 Explain how the criteria for triangle congruence (ASA, SAS, and SSS) follow from the definition of congruence in terms of rigid motions. G.CO.9 Prove theorems about lines and angles. Theorems include: vertical angles are congruent; when a transversal crosses parallel lines, alternate interioir angles are congruent and corresponding angles are congruent; points on a perpendicular bisector of a line segment are exactly those equidistant from the segment’s endpoints. Rigid motion, reflection, rotation, translation, congruent, composition, map, SAS, ASA, SSS Theorem, linear pair, vertical angles, alternate interior angles, alternate exterior, same-side intrior angles, corresponding angles, perpendicular bisector, supplementary angles, complimentary angles, equidistant, congruent, adjacent, consecutive/non-consecutive, reflection, Law of Syllogism Unit Learning targets Students will be able to: Rowan County Senior High School 2010-2011 A Word wall Think-Pair Share Anticipation Guides Admit/exit slips Jigsaw Double entry organizer Note-taking Guide Win-GEOM Geogebra Smartboard interactions Power point presentations Sage and Scribe I can define rigid motions as reflections, rotations, translations, and combinations of these, all of which preserve distance and angle measure. I can list the sufficient conditions to prove triangles are congruent. I can map a triangle with one of the sufficient conditions ( e.g., SSS) onto the original triangle and show that corresponding sides and corresponding angles are congruent. I can identify and use the properties of congruence and equality (reflexive, symmetric, transitive) in my proofs. I can order statements based on the Law of Syllogism when constructing my proof. I can correctly interpret geometric diagrams by identifying what can and cannot be assumed. I can use theorems, postulates, or definitions to prove theorems about lines and angles, including: a) Vertical angles are congruent; b) When a transversal crosses parallel lines alternate interior angles are congruent and corresponding angles are congruent, and sameside interior angles are supplementary; c) Points on a perpendicular bisector of a line segment are exactly those equidistant from the segment’s endpoints. Page 4 RCHS Rev. 06/2011 Cluster – Prove geometric theorems G.CO.10 Prove theorems about triangles. Theorems include: measures of interior angles of a triangle sum to 180̊ ; base angles of isosceles triangles are congruent; the segment joining midpoints of two sides of a triangle is parallel to the third side and half the length; the medians of a triangle meet at a point. G.CO.11 Prove theorems about parallelograms. Theorems include: opposite sides are congruent, opposite angles are congruent, the diagonals of a parallelogram bisect each other, and conversely, rectangles are parallelograms with congruent diagonals. Rowan County Senior High School 2010-2011 Geometry Vocabulary: Midpoint, midsegment, isosceles triangle, median, centroid, coordinate proof, adjacent, consecutive/ non-consecutive, Law of Syllogism Quadrilateral, parallelogram, rectangle, diagonals, distance formula, midpoint formula, slope, bisector, congruence properties Unit Learning targets Students will be able to: I can order statements based on the Law of Syllogism when constructing my proof. I Can correctly interpret geometric diagrams (what can and cannot be assumed). I Can use theorems, postulates, or definitions to prove theorems about triangles, including a) Measures of interior angles of a triangle sum to 180̊ ; b) Base angles of isosceles triangles are congruent; c) The segment joining midpoints of two sides of a triangle is parallel to the third side and half the length; d) The medians of a triangle meet at a point. A Word wall Think-Pair Share Anticipation Guides Admit/exit slips Jigsaw Double entry organizer Note-taking Guide Win-GEOM Geogebra Smartboard interactions Power point presentations Sage and Scribe I can use theorems, postulates, or definitions to prove theorems about parallelograms, including: a) Prove opposide sides of a parallelogram are congruent; b) Prove opposite angles of a parallelogram are congruent; c) Prove the diagonals of a parallelogram bisect each other; d) Prove that rectangles are parallelograms with congruent diagonals. Page 5 RCHS Rev. 06/2011 Cluster – Make geometric constructions G.CO.12 Make formal geometric constructions with a variety of tools and methods (compass and straightedge, string, reflective devices, paper folding, dynamic geometric software, etc.). Copying a segment; copying an angle; bisecting a segment; bisecting an angle; constructing perpendicular lines, including the perpendicular bisector of a line segment; and constructing a line parallel to a given line through a point not on the line. G.CO.13 Construct an equilateral triangle, a square, and a regular hexagon inscribed in a circle. Geometry Vocabulary: Segment, angle, perpendicular lines, perpendicular bisector, parallel lines, bisect, formal construction, informal construction, compass, straightedge Construction, equilateral triangle, square, regular hexagon, inscribe, circle. Word wall Think-Pair Share Anticipation Guides Admit/exit slips Jigsaw Double entry organizer Note-taking Guide Win-GEOM Geogebra Smartboard interactions Power point presentations Sage and Scribe Unit Learning targets Students will be able to: Rowan County Senior High School 2010-2011 A I can identify the tools used in formal constructions. I can use tools and methods to precisely copy a segment, copy an angle, bisect a segment, bisect an angle, construct perpendicular lines and bisectors, and construct a line parallel to a given line through a point not on the line. I can informally perform the constructions listed above using string, reflective devices, paper folding, and/or dynamic geometric software. I can define inscribed polygons (the vertices of the figure must be points on the circle). I can construct an equilateral triangle inscribed in a circle. I can construct a square inscribed in a circle. I can construct a hexagon inscribed in a circle. I can explain the steps to constructing an equilateral triangle, a square, and a regular hexagon inscribed in a circle. Page 6 RCHS Rev. 06/2011 Geometry Unit Two Length of Unit 4 weeks Domain Similarity, Right triangles, and Trigonometry A Similarity, Right Triangles, and Trigonometry KY Common Core Academic Standards G.SRT.1a Verify experimentally the properties of dilations given by a center by a center and a scale factor. b. A dilation takes a line not passing through the center of the dilation to a parallel line, and leaves a line passing through the center unchanged. Rowan County Senior High School 2010-2011 Vocabulary Unit Learning Targets Vocabulary: Image Center pre-image similar figures scale factor Unit Learning targets Students will be able to: I will identify a dilation, stating its scale factor and center. I will verify experimentally that a dilated image is similar to its pre-image by showing congruent corresponding angles and proportional sides. I will verify experimentally that a dilation takes a line not passing through the center of the dilation to a parallel line by showing the lines are parallel. I will verify experimentally that dilation leaves a line passing through the center of the dilation unchanged by showing that it is the same line. Activities/Assessments/ Resources Word wall Think-Pair Share Anticipation Guides Admit/exit slips Jigsaw Double entry organizer Note-taking Guide Win-GEOM Geogebra Smartboard interactions Page 7 RCHS Rev. 06/2011 Geometry Unit Two Length of Unit Cont. Domain Similarity, Right triangles, and Trigonometry A Similarity, Right Triangles, and Trigonometry KY Common Core Academic Standards G.SRT.1b Verify experimentally the properties of dilations given by a center and a scale factor. b. The dilation of a line segment is longer or shorter in the ratio given by the scale factor. G.SRT.2 Given two figures, use the definition of similarity in terms of similarity transformations to decide if they are similar; explain using similarity transformations the meaning of similarity for triangles as the equality of all corresponding pairs of angles and the proportionality of all corresponding pairs of sides. Rowan County Senior High School 2010-2011 Vocabulary Unit Learning Targets Vocabulary: Image Center pre-image similar figures scale factor Unit Learning targets Students will be able to: I will explain that the scale factor represents how many times longer or shorter a dilated line segment is than it’s pre-image. I will verify experimentally that the dilation of a line segment is longer or shorter in the ratio given by the scale factor. Activities/Assessments/ Resources Word wall Think-Pair Share Anticipation Guides Admit/exit slips Jigsaw Double entry organizer Note-taking Guide Win-GEOM Geogebra Smartboard interactions I will use similarity transformations to explain that triangles are similar if all pairs of corresponding angles are congruent and all corresponding pairs of sides are proportional. I will, when given two figures, decide if they are similar by using the definition of similarity in terms of similarity transformations. Page 8 RCHS Rev. 06/2011 Domain Similarity, Right triangles, and Trigonometry G.SRT.3 Use the properties of similarity transformations to establish the AA criterion for two triangles to be similar. Geometry A Vocabulary Properties of similarity transformations Pythagorean Theorem postulates AA similarity theorems Unit Learning targets Students will be able to: G.SRT.4 Prove theorems about triangles. Theorems include: a line parallel to one side of a triangle divides the other two proportionally, and conversely; the Pythagorean Theorem proved using triangle similarity. I will recall the properties of similarity transformations. I will establish the AA criterion for similarity of triangles by extending the properties of similarity transformations to the general case of any two similar triangles. I will prove theorems involving similarity about triangles. (Theorems include: a line parallel to one side of a triangle divides the other two proportionally, and conversely; the Pythagorean Theorem proved using triangle similarity.) I will recall postulates, theorems, and definitions to prove theorems about triangles. G.SRT.5 Use congruence and similarity criteria for triangles to solve problems and to prove relationships in geometric figures. Rowan County Senior High School 2010-2011 Word wall Think-Pair Share Anticipation Guides Admit/exit slips Jigsaw Double entry organizer Note-taking Guide Win-GEOM Geogebra Smartboard interactions I will recall congruence and similarity criteria for triangles. I will use congruency and similarity theorems for triangles to solve problems. I will use congruency and similarity theorems for triangles to prove relationships in geometric figures. Page 9 RCHS Rev. 06/2011 Geometry Domain Vocabulary Similarity, Right triangles, and Trigonometry Trigonometric ratios sine Complementary angles G.SRT.6 Understand that by similarity, side ratios in right triangles are properties of the angles in the triangle, leading to definitions of trigonometric ratios for acute angles. G.SRT.8 Use trigonometric ratios and the Pythagorean Theorem to solve right triangles in applied problems. Rowan County Senior High School 2010-2011 tangent Unit Learning targets Students will be able to: G.SRT.7 Explain and use the relationship between the sine and cosine of complementary angles. cosine A I will name the sides of a right triangle as related to an acute angle. I will recognize that if two right triangles have a pair of acute, congruent angles that the triangles are similar. I will compare common ratios for similar right triangles and develop a relationship between the ratio and the acute angle leading to the trigonometry ratios. Word wall Think-Pair Share Anticipation Guides Admit/exit slips Jigsaw Double entry organizer Note-taking Guide Win-GEOM Geogebra Smartboard interactions I will use the relationship between the sine and cosine of complementary angles. I will explain how the sine and cosine of complementary angles are related to each other. I will recognize which methods could be used to solve right triangles in applied problems. I will solve for an unknown angle or side of a right triangle using sine, cosine, and tangent. I will apply right triangle trigonometric ratios and the Pythagorean Theorem to solve right triangles in applied problems. Page 10 RCHS Rev. 06/2011 Geometry Domain Vocabulary Modeling with geometry Measures of geometric shapes, properties of geometric shapes density volume typographical grid design problems G.MG.1 Use geometric shapes, their measures, and their properties to describe objects (e.g., modeling a tree trunk or a human torso as a cylinder) G.MG.2 Apply concepts of density based on area and volume in modeling situations (e.g., persons per square mile, BTUs per cubic foot).* *Modeling Standard) G.MG.3 Apply geometric methods to solve design problems (e.g., designing an object or structure to satisfy physical constraints or minimize cost; working with typographic grid systems based on ratios). * (*Modeling Standard) Rowan County Senior High School 2010-2011 Unit Learning targets Students will be able to: I will use measures and properties of geometric shapes to describe real world objects. I will, when given a real world object, classify the object as a known geometric shape – use this to solve problems in context. A Word wall Think-Pair Share Anticipation Guides Admit/exit slips Jigsaw Double entry organizer Note-taking Guide Win-GEOM Geogebra Smartboard interactions Focus on situations well modeled by trigonometric ratios for acute angles. I will define density. I will apply concepts of density based on area and volume to model real-life situations (e.g., persons per square mile, BTUs per cubic foot). I will describe a typographical grid system. I will apply geometric methods to solve design problems. Design an object or structure to satisfy physical constraints or minimize cost; working with typographic grid systems based on ratios. Page 11 RCHS Rev. 06/2011 Geometry A Vocabulary Domain Similarity, right triangles, and trigonometry Right triangle trigonometry G.SRT.9 (+) Derive the formula A = ½ ab sin(c) for the area of a triangle by drawing an auxiliary line from a vertex perpendicular to the opposite side. G.SRT.10 (+) Prove the Laws of Sines and Cosines and use them to solve problems G.SRT.11 (+) Understand and apply the Law of Sines and the Law of Cosines to find unknown measurements in right and non-right triangles (e.g., surveying problems, resultant forces). Rowan County Senior High School 2010-2011 Law of Sines Law of Cosines Unit Learning targets Students will be able to: I will recall right triangle trigonometry to solve mathematical problems. I will derive the formula A = ½ sin(c) for the area of a triangle by drawing an auxiliary line from a vertex perpendicular to the opposite side. I will prove the Law of Sines. I will prove the Law of Cosines. I will recognize when the Law of Sines or Law of Cosines can be applied to a problem and solve problems in context using them. I will apply the Law of Sines and the Law of Cosines to find unknown measurements in right and non-right triangles (e.g., surveying problems, resultant forces). I will determine from given measurements in right and non-right triangles whether it is appropriate to use the Law of Sines or Cosines Word wall Think-Pair Share Anticipation Guides Admit/exit slips Jigsaw Double entry organizer Note-taking Guide Win-GEOM Geogebra Smartboard interactions With respect to the general case of Laws of Sines and Cosines, the definition of sine and cosine must be extended to obtuse angles. Page 12 RCHS Rev. 06/2011 Geometry Unit Three Length of Unit Domain Geometric Measurement and Dimension Vocabulary/Learning Targets Vocabulary: formulas cylinders pyramids cones spheres two-dimensional three-dimensional cross-sections rotations geometric shapes and their properties G.GMD.3 Use volume formulas for cylinders, pyramids, cones, and spheres to solve problems. *(*Modeling Standard) G.GMD.4 Identify the shapes of two-dimensional crosssections of threedimensional objects, and identify threedimensional objects generated by rotations of two-dimensional objects. Domain – Modeling with Geometry Geometric Measurement and Dimension KY Common Core Academic Standards 4 weeks G.MG.1 Use geometric shapes, their measures, and their properties to describe objects (e.g., modeling a tree trunk or a human torso as a cylinder). *(* Modeling standard) Rowan County Senior High School 2010-2011 A Unit Learning Targets Students will be able to Utilize the appropriate formula for volume depending on the figure. Use volume formulas for cylinders, pyramids, cones, and spheres to solve contextual problems. Relate the shapes of two-dimensional cross-sections to their three-dimensional objects Discover three-dimensional objects generated by rotations of two-dimensional objects. Use strategies to help visualize relationships between two-dimensional and three-dimensional objects. Activities/Assessments/ Resources Word wall Think-Pair Share Anticipation Guides Admit/exit slips Jigsaw Double entry organizer Note-taking Guide Win-GEOM Geogebra Smartboard interactions Informal arguments for area and volume formulas can make use of the way in which area and volume scale under similarity transformations: when one figure in the plane results from another by applying a similarity transformation with scale factor K, its area is K2 times the area of the first. Similarly, volumes of solid figures scale by K3 under a similarity transformations with scale factor K. Given a real world object, classify the object as a known geometric shape; use this to solve problems in context. Use measures and properties of geometric shapes to describe real world objects. Page 13 RCHS Rev. 06/2011 Geometry Unit Four Length of Unit 4 weeks Cluster – Use coordinates to prove simple geometric theorems algebraically. A Expressing Geometric Properties with Equations KY Common Core Academic Standards Vocabulary/Learning Targets Vocabulary: Coordinate geometry distance, midpoint, slope, equation of a line, parallel, perpendicular, proof G.GPE.4 Use coordinates to prove simple geometric theorems algebraically. For example, prove or disprove that a figure defined by four given points in the coordinate plane is a rectangle; prove or disprove that the point (1, ) lies on the circle centered at the origin and containing the point (0,2). Rowan County Senior High School 2010-2011 Unit Learning Targets Students will be able to Use coordinates to prove simple geometric theorems algebraically. For example, prove or disprove that a figure defined by four given points in the coordinate plane is a rectangle; prove or disprove that the point (1, ) lies on the circle centered at the origin and containing the point (0,2). Recall previous understandings of coordinate geometry (including but not limited to: distance, midpoint and slope formula, equations of a line, definitions of parallel and perpendicular lines, etc.) Activities/Assessments/ Resources Word wall Think-Pair Share Anticipation Guides Admit/exit slips Jigsaw Double entry organizer Note-taking Guide Win-GEOM Geogebra Smartboard interactions Page 14 RCHS Rev. 06/2011 Geometry A Word wall Think-Pair Share Anticipation Guides Admit/exit slips Jigsaw Double entry organizer Note-taking Guide Win-GEOM Geogebra Smartboard interactions Vocabulary: Ratio , coordinate geometry, positive slope, negative slope perimeter area distance formula parabola focus directrix Unit Learning Targets Students will be able to Recall the definition of ratio. Recall previous understandings of coordinate geometry. Given a line segment (including those with positive and negative slopes) and a ratio, find the point on the segment that partitions the segment into the given ratio. Use the coordinates of the vertices of a polygon to find the necessary dimensions for finding the perimeter. Use the coordinates of the vertices of a triangle to find the necessary dimensions (base, height) for finding the area (i.e., the distance between vertices by counting, distance formula, Pythagorean Theorem, etc.) Use the coordinates of the vertices of a rectangle to find the necessary dimensions (base, height) for finding the area (i.e., the distance between vertices by counting, distance formula). Formulate a model of figures in contextual problems to compute area and/or perimeter. Rowan County Senior High School 2010-2011 Page 15 RCHS Rev. 06/2011 Cluster – Use coordinates to prove simple geometric theorems algebraically Geometry Vocabulary: Parallel lines slope perpendicular lines reciprocals Equation ratio distance Pythagorean Theorem polygon area G.GPE.5 Prove the slope criteria for parallel and perpendicular lines and use them to solve geometric problems (e.g., find the equations of a line parallel or perpendicular to a given line that passes through a given point). G.GPE.6 Find the point on a directed line segment between two given points that partitions the segment in a given ratio. G.GPE.7 Use coordinates to compute perimeters of polygons and area of triangles and rectangles, e.g., using the distance formula. *(*Modeling Standard) Rowan County Senior High School 2010-2011 Unit Learning Targets Students will be able to Recognize that slopes of parallel lines are equal. Recognize that slopes of perpendicular lines are opposite reciprocals(i.e. the slopes of perpendicular lines have a product of -1) Find the equation of a line parallel to a given line that passes through a given point. Find the equation of a line perpendicular to a given line that passes through a given point. Prove the slope criteria for parallel and perpendicular lines and use them to solve geometric problems. Recall the definition of ratio. Given a line segment (including those with positive and negative slopes) and a ratio, find the point on the segment that partitions the segment into the given ratio. Use the coordinates of the vertices of a polygon to find the necessary dimentsions for finding the perimeter (ie. The distance between vertices). Use the coordinates of the vertices of a triangle to find the necessary dimensions (base, height) for finding the area ( i.e. the distance between vertices by counting, distance formula, Pythagorean Theorem, etc.). Formulate a model of figures in contextual problems to compute area and/or perimeter. A Word wall Think-Pair Share Anticipation Guides Admit/exit slips Jigsaw Double entry organizer Note-taking Guide Win-GEOM Geogebra Smartboard interactions Be sure to relate this to systems of equations having no solutions or infinitely many solutions Distance formula and its connection with the Pythagorean theorem. Page 16 RCHS Rev. 06/2011 Cluster – Translate between the geometric description and the equation for a conic section. Geometry Vocabulary: Parabola focus directrix Unit Learning Targets Students will be able to: G.GPE.2 Derive the equation of a parabola given a focus and directrix. Rowan County Senior High School 2010-2011 Define a parabola including the relationship of the focus and the equation of the directrix to the parabolic shape. Derive the equation of parabola given the focus and directrix. A Word wall Think-Pair Share Anticipation Guides Admit/exit slips Jigsaw Double entry organizer Note-taking Guide Win-GEOM Geogebra Smartboard interactions The directrix should be parallel to a coordinate axis. Page 17 RCHS Rev. 06/2011 Geometry Unit Five Length of Unit A Circles KY Common Core Academic Standards Vocabulary/Learning Targets Activities/Assessments/ Resources 4 weeks Cluster – Understand and apply theorems about circles. G.C.1 Prove that all circles are similar. Vocabulary: Circle circumference diameter dilation inscribed angles Radii chords central angles circumscribed angles Diameter tangent right angles point of tangency Unit Learning Targets Students will be able to G.C.2 Identify and describe relationships among inscribed angles, radii, and chords. Include the relationship between central, inscribed, and circumscribed angles; inscribed angles on a diameter are right angles; the radius of a circle is perpendicular to the tangent where the radius intersects the circle. Rowan County Senior High School 2010-2011 Compare the ratio of the circumference of a circle to the diameter of the circle. Discuss, develop and justify this ratio for several circles. Determine that this ratio is constant for all circles. Recognize when figures are similar. When one figure is a dilation of the other. Word wall Think-Pair Share Anticipation Guides Admit/exit slips Jigsaw Double entry organizer Note-taking Guide Win-GEOM Geogebra Smartboard interactions Identify inscribed angles, radii, chords, central angles, circumscribed angles, diameter, tangent. Recognize that inscribed angles on a diameter are right angles. Recognize that radius of a circle is perpendicular to the radius at the point of tangency. Examine the relationship between central, inscribed and circumscribed angles by applying theorems about their measures. Page 18 RCHS Rev. 06/2011 Geometry Vocabulary: Tangent radius perpendicular bisector midpoint Arc Inscribed circles circumscribed circles Midpoint bisector point of concurrency Cluster – Understand and apply theorems about circles. Unit Learning Targets Students will be able to G.C.3 Construct the inscribed and circumscribed circles of a triangle, and prove properties of angles for a quadrilateral inscribed in a circle. G.C.4 (+) Construct a tangent line from a point outside a given circle to the circle. A Word wall Think-Pair Share Anticipation Guides Admit/exit slips Jigsaw Double entry organizer Note-taking Guide Win-GEOM Geogebra Smartboard interactions Define inscribed and circumscribed circles of a triangle. Recall midpoint and bisector definitions. Define a point of concurrency. Prove properties of angles for a quadrilateral inscribed in a circle. Construct inscribed circles of a triangle. Construct circumscribed circles of a triangle. Synthesize theorems that apply to circles and tangents, such as: tangent drawn from a common external point are congruent, a radius is perpendicular. Construct the perpendicular isector of the line segment between the center C to the outside point P. Construt arcs on circle C from the midpoint Q, have length CQ. G.C.5 Derive using similarity the fact that the length of the arc intercepted by an angle is proportional to the radius, and define the radian measure of the angle as the constraint of proportionality; derive the formula for the area of a sector. Rowan County Senior High School 2010-2011 Determine the constant of proportionality(scale factor) Explain that 1̊ = /180 radians. Justify the radii of any two circles (r1 and r2) and the arc lengths (s1 and s2) determined by congruent central angles are proportional, such that r1/s1 = r2/s2 . Verify that the constant of a proportion is the same as the radian measure, Ѳ, of the given central angle. Conclude s = r Ѳ. Construct the tangent line. Emphasize the similarity of all circles. Note that by similarity of sectors with the same central angle, arc lengths are proportional to the radius. Use this as a basis for introducing radian as a unit of measure. It is not intended that it be applied to the development of circular trigonometry in this course. Page 19 RCHS Rev. 06/2011 Geometry A Vocabulary: Cluster – Translate between the geometric description and the equation for a conic section. G.GPE.1 Derive the equation of a circle of given center and radius using the Pythagorean Theorem; complete the square to find the center and radius of a circle given an equation. G.GPE.4 Use coordinates to prove simple geometric theorems algebraically. For example, prove or disprove that a figure defined by four given points in the coordinate plane is a rectangle; prove or disprove that the point (1, ) lies on the circle centered at the origin and containing the point (0,2) Rowan County Senior High School 2010-2011 Equation of a circle complete the square Sector radian distance midpoint slope perpendicular lines parallel lines Unit Learning Targets Students will be able to Define a circle. Complete the square of a quadratic equation. Derive equation of a circle using the Pythagorean theorem – given coordinates of the center and length of the radius. Determine the center and radius by completing the square. Use coordinates to prove simple geometric theorems algebraically. For example prove that a figure is a rectangle given 4 coordinates or prove that a point lies on a circle given the coordinates for its center. Word wall Think-Pair Share Anticipation Guides Admit/exit slips Jigsaw Double entry organizer Note-taking Guide Win-GEOM Geogebra Smartboard interactions Emphasize the similarity of all circles. Note that by similarity of sectors with the same central angle, arc lengths are proportional to the radius. Use this as a basis for introducing radians as a unit of measure. It is not intended that it be applied to the development of circular trigonometry in this course. Include simple proofs that involve circles. Page 20 RCHS Rev. 06/2011 Cluster – apply geometric concepts in modeling situations Geometry G.MG.1 Use geometric shapes, their measures, and their properties to describe objects (e.g., modeling a tree trunk or a human torso as a cylinder). * (*Modeling Standard) Vocabulary: Geometric shape Unit Learning Targets Students will be able to Unit Three Length of Unit KY Common Core Academic Standards Rowan County Senior High School 2010-2011 Use measures and properties of geometric shapes to describe real world objects. Given a real world object, classify the object as a known geometric shape – use this to solve problems in context. A Word wall Think-Pair Share Anticipation Guides Admit/exit slips Jigsaw Double entry organizer Note-taking Guide Win-GEOM Geogebra Smartboard interactions Focus on situations in which the analysis of circles is required. Geometric Measurement and Dimension Vocabulary/Learning Targets Activities/Assessments/ Resources Page 21 RCHS Rev. 06/2011 Rowan County Senior High School 2010-2011 Geometry A Page 22