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Geometry Conceptual Category(s) Domain Cluster Alignments: CCSS: See below Performance: 1.10, 3.5, 3.3 Knowledge: (MA) 5 MACLE: See below NETS: 2d; 4b DOK: 1-3 • • • • • Geometry Congruence (G-CO) Experiment with transformations in the plane (G-CO.1) Prove geometric theorems (G-CO.9) Make geometric constructions (G-CO.12) Standards Learning Targets G-CO.1, 9, 12 1. Know precise definitions of angle, circle, perpendicular line, parallel line, and line segment, based on the undefined notions of point, line, distance along a line, and distance around a circular arc 9. Prove theorems about lines and angles. Theorems include: vertical angles are congruent when a transversal crosses parallel lines, alternate interior angles are congruent and corresponding angles are congruent; points on a perpendicular bisector of a line segment are exactly those equidistant from the segments endpoints 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; 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 Unit A: Basic Geometry: Learn definitions of basic geometric principles, prove and apply theorems about special angles, and create formal geometric constructions • • • Apply the concepts of point, line and plane Apply the definition of segment, congruent, midpoint, and bisect Apply the definition of perpendicular, parallel and ray CCSS: G-CO.1 MACLE: GSR.1 • Copy a segment and bisect a segment using a compass and straightedge CCSS: G-CO.12 MACLE: GSR.1 • Construct perpendicular lines, the perpendicular bisector of a segment, and a line parallel to a given line through a point not on the line using a compass and straightedge CCSS: G-CO.12 MACLE: N/A Approved 7-15-13 Revised 2013 1 Geometry • Use the segment addition postulate to find the length of segments CCSS: G-CO.1 MACLE: NO.2.D • Apply the definition of angle and angle bisector, and use the angle addition postulate to find the measure of an angle CCSS: G-CO.1 MACLE: M.2.B • Copy an angle and bisect an angle using a compass and a straightedge CCSS: G-CO.12 MACLE: N/A • Identify types of angles including linear pair, supplements, complements, vertical, adjacent, to prove and apply theorems about angles CCSS: G-CO.1 MACLE: GSR.1.A • Apply the definition of transversal and identify types of angles including alternate interior, alternate exterior, same-side interior, sameside exterior and corresponding to prove and apply theorems about angles • Prove and use properties of parallel lines cut by a transversal CCSS: G-CO.9 MACLE: M.2.B Approved 7-15-13 Revised 2013 2 Geometry Instructional Strategies • • • • • Lecture enhanced with: • SMART Notebook • PowerPoint • the Internet Drill and guided practice Demonstrations on constructions Reflective discussion Class discussion Assessments/Evaluations The students will be assessed on the concepts taught using a variety of modalities: • Direct teacher observations • Projects w/ scoring guides: • Design a City Map: Using this real-world application, the students will work in small groups to design a city based on the terms and theorems learned in this unit (under development) • Quizzes • Homework assignments • Formal common assessment – Unit A test Mastery Level: 80% Instructional Resources/Tools Textbook(s): Pearson Geometry Common Core Website(s): • How to construct a line parallel to a given line through a given point: http://www.youtube.com/watch?v=WWvkS-IGjtM • How to construct a perpendicular line through a point not on the line: http://www.youtube.com/watch?v=R6YltpN8QIU • Scientific calculator • • Approved 7-15-13 Revised 2013 3 Geometry Conceptual Category(s) Domain Cluster • • • • Geometry Congruence (G-CO) Experiment with transformations in the plane (G-CO.2-5) Understand congruence in terms of rigid motions (G-CO.6) Alignments: CCSS: See below Performance: 1.10, 3.3 Knowledge: (MA) 2 MACLE: See below NETS: 1b; 3a; 4d DOK: 1-3 Standards G-CO.2-6 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) 3. Given a rectangle, parallelogram, trapezoid, or regular polygon, describe the rotations and reflections that carry it onto itself 4. Develop definitions of rotations, reflections, and translations in terms of angles, circles, perpendicular lines, parallel lines, and line segments 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 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 Learning Targets Unit B: Transformations: Represent, compare, perform and describe transformations in the plane • Identify isometries (e.g., basic rigid transformations – reflections, translations, and rotations) CCSS: G-CO.2,4,6 MACLE: GSR.3.A • • • Perform and use reflections in the plane in terms of the given definition Perform and use translations in the plane in terms of the given definition Perform and use rotations in the plane in terms of the given definition CCSS: G-CO.2,4,5 MACLE: GSR.3.A • Identify and use types of 2-D symmetry (line and rotational symmetry) and 3-D symmetry (plane and axis symmetry) on a given figure/object CCSS: G-CO.3,4 MACLE: GSR.3.C Approved 7-15-13 Revised 2013 4 Geometry • Represent transformations as compositions of simpler transformations CCSS: G-CO.5,6 MACLE: GSR.3.A Instructional Strategies • • • • • Lecture enhanced with: • SMART Notebook • PowerPoint • the Internet Drill and guided practice Demonstrations of various transformations on: • Geogebra • Geometer’s Sketchpad • wax paper Reflective discussion Class discussion Assessments/Evaluations The students will be assessed on the concepts taught using a variety of modalities: • Direct teacher observations • Quizzes • Homework assignments • Formal common assessment – Unit B test Mastery Level: 80% Instructional Resources/Tools • • • • Textbook(s): Bass et al., Prentice Hall Mathematics Geometry. Boston: Pearson/Prentice Hall, 2004. Website(s): www.geogebra.org Software: • Geometer’s Sketchpad • Geogebra Scientific calculator Approved 7-15-13 Revised 2013 5 Geometry Conceptual Category(s) Domain • Geometry • Expressing Geometric Properties with Equations (G-GPE) • Congruence (G-CO) Cluster • Use Coordinates to prove simple geometric theorems algebraically (G-GPE.4-7) • Prove Geometric Theorems (G-CO.11) Alignments: CCSS: See below Performance: 1.6, 1.10, 3.4, 3.5 Knowledge: (MA) 2,4 MACLE: See below NETS: 3d; 4c; 6b DOK: 1-3 Standards G-GPE.4-7 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, √3) lies on the circle centered at the origin and containing the point (0, 2) 5. Prove the slope criteria for parallel and perpendicular lines and use them to solve geometric problems (e.g., find the equation of a line parallel or perpendicular to a given line that passes through a given point) 6. Find the point on a directed line segment between two given points that partitions the segment in a given ratio 7. Use coordinates to compute perimeters of polygons and areas of triangles and rectangles, e.g., using the distance formula Learning Targets Unit C: Coordinate Geometry: Apply properties of parallel and perpendicular lines to write equations of lines. Use the distance and midpoint formulas and theorems about special parallelograms to prove conjectures or classify shapes • • Find the slope of a line, given the coordinates or a graph Find the point on a directed line segment between two given points that partitions the segment in a given ratio CCSS: G-GPE.6 MACLE: N/A • G-CO.11 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 Approved 7-15-13 Write equations of lines in slope-intercept and point-slope form CCSS: G-GPE.4 MACLE: AR.4.A Write equations of parallel and perpendicular lines CCSS: G-GPE.5 MACLE: AR.4.A Revised 2013 6 Geometry • • • Use the distance and/or midpoint formula to find the length and/or midpoint of a segment Prove the classification of a polygon on the coordinate grid Use coordinates to find the perimeters and/or areas of polygons CCSS: G-GPE.4,5,7 MACLE: M.2.B; GSR.2.A • • • • • • • • Apply theorems about parallelograms Use coordinates to prove a quadrilateral is a parallelogram Prove if a quadrilateral is a parallelogram by applying theorems about parallelograms Prove if a quadrilateral is a parallelogram using coordinates Apply theorems about special parallelograms Use coordinates to prove if a quadrilateral is a special parallelogram and compute the perimeter Use properties of trapezoids and kites Use coordinates to classify quadrilaterals and compute perimeters CCSS: G-GPE.4; G-CO.11 MACLE: GSR.1.A; GSR.2.A Instructional Strategies • • • • Lecture enhanced with: • SMART Notebook • PowerPoint • the Internet Drill and guided practice Reflective discussion Class discussion Approved 7-15-13 Revised 2013 7 Geometry Assessments/Evaluations The students will be assessed on the concepts taught using a variety of modalities: • Direct teacher observations • Quizzes • Homework assignments • Formal common assessment – Unit C test Mastery Level: 80% Instructional Resources/Tools Textbook(s): Bass et al., Prentice Hall Mathematics Geometry. Boston: Pearson/Prentice Hall, 2004. Website(s): • www.ixl.com • www.khanacademy.org • Scientific calculator • • Approved 7-15-13 Revised 2013 8 Geometry Conceptual Category(s) Domain • Geometry • Congruence (G-CO) • Similarity, Right Triangles, and Trigonometry (G-SRT) Cluster • Understand congruence in terms of rigid motion (G-CO.7, 8) • Prove geometric theorems (G-CO.9, 10) • Prove theorems involving similarity (G-SRT.5) Alignments: CCSS: See below Performance: 1.10, 3.5, 4.1 Knowledge: (MA) 2 MACLE: See below NETS: 1a; 4c DOK: 1-3 Standards G-CO.7-10 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 8. Explain how the criteria for triangle congruence (ASA, SAS, and SSS) follow from the definition of congruence in terms of rigid motions 9. Prove theorems about lines and angles. Theorems include: vertical angles are congruent; when a transversal crosses parallel lines, alternate interior angles are congruent and corresponding angles are congruent; points on a perpendicular bisector of a segment are exactly those equidistant from the segments endpoints 10. Prove theorems about triangles. Theorems include: measures of interior angles of a triangle sum to 180°; 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 Learning Targets Unit D: Triangle Congruence & Properties and Attributes of Triangles: Understand congruence in terms of rigid motions, prove geometric theorems, and prove theorems involving similarity as they apply to triangles • • • • • Classify triangles by their angle measures and side lengths Use triangle classifications to find angle measures and side lengths Prove and use Triangle-Angle Sum Theorem Prove and use the Isosceles Triangle Theorem and its converse Prove and use the Equilateral and Equiangular Triangle Corollaries CCSS: G-CO.10 MACLE: M.2.B; GSR.4.B • • Apply a rigid transformation to a polygon and prove the polygon remains congruent to the pre-image Prove two polygons are congruent if and only if all the corresponding pairs of sides and corresponding pairs of angles are congruent CCSS: G-CO.7 MACLE: M.2.B Approved 7-15-13 Revised 2013 9 Geometry G-SRT.5 5. Use congruence and similarity criteria for triangles to solve problems and to prove relationships in geometric figures • Apply and prove triangle congruence with the following postulates or theorems: SSS, SAS, ASA, AAS and HL CCSS: G-CO.8; G-SRT.5 MACLE: M.2.B • Prove corresponding parts of congruent triangles are congruent (CPCTC) and use to solve problems CCSS: G-SRT.5 MACLE: M.2.B • • • Locate perpendicular bisectors, angle bisectors, medians, and altitudes of a triangle and identify the name of the point created by their respective intersections Prove the Mid-segment Theorem Prove points on a perpendicular bisector are exactly those equidistant from the segments endpoints CCSS: G-CO.9,10 MACLE: M.2.B; NO.2.D • • Prove the sum of any two side lengths of a triangle is greater than the third side length Reason and prove angle-side relationships in triangles. (i.e., The longest side of a triangle is opposite the largest angle) CCSS: G-CO.10 MACLE: M.2.B; NO.2.D Approved 7-15-13 Revised 2013 10 Geometry Instructional Strategies • • • • • • • Lecture enhanced with: • SMART Notebook • PowerPoint • the Internet Drill and guided practice: e.g., “Speed Dating”/Flash Card activity over recognizing which postulate or theorem proves a pair of triangles congruent Demonstrations such as modeling the constructions of: • circumcenter • incenter • centroid • orthocenter Problem solving: e.g., Proof Card-Sorting activities Class discussion Technology enhanced such as online: • instructional videos • practices that give immediate feedback to students: • www.ixl.com • www.khanacademy.org) Literacy such as: • written explanations of how to prove triangles congruent • how parts of congruent triangles are congruent – paragraph proofs Approved 7-15-13 Revised 2013 11 Geometry Assessments/Evaluations The students will be assessed on the concepts taught using a variety of modalities: • Direct teacher observations • Concept checkpoints such as: • starters • entrance/exit passes • target tickets • homework quizzes • Quizzes • Homework assignments • Formal common assessment – Unit D Test Master Level: 80% Instructional Resources/Tools Textbook(s): • Pearson Geometry • Holt McDougal Geometry • Website(s): • www.ixl.com • www.khanacademy.org • Scientific calculator • Approved 7-15-13 Revised 2013 12 Geometry Conceptual Category(s) Domain Cluster Alignments: CCSS: See below Performance: 1.6 Knowledge: (MA) 2,4 MACLE: See below NETS: 1c; 2d; 4a DOK: 1-3 • • • • • • Geometry Similarity, Right Triangles, and Trigonometry (G-SRT) Circles (G-C) Understand similarity in terms of similarity transformations (G-SRT.1) Prove theorems involving similarity (G-SRT.4, 5) Understand and apply theorems about circles (G-C.1) Standards G-SRT.1-4 1. Verify experimentally the properties of dilations given by a center and a scale factor: 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 b. The dilation of a line segment is longer or shorter in the ratio given by the scale factor 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 proportionality of all corresponding pairs of sides 3. Use the properties of similarity transformations to establish the AA criterion for two triangles to be similar 4. Prove theorems about triangles. Theorems include: a line parallel to one side of a triangle divides the other two sides proportionally, and conversely; the Pythagorean Theorem proved using triangle similarity Learning Targets Unit E: Similarity: Use similarity to analyze and solve problems • • • Write ratios and solve proportions Define similarity as a composition of rigid motions followed by dilations in which angle measure is preserved and side length is proportional Demonstrate that in a pair of similar triangles or in a pair of similar figures, corresponding angles are congruent and corresponding sides are proportional CCSS: G-SRT.2 MACLE: NO.3.E; M.2.B; GSR.1.A; GSR.3.A • Use triangle similarity theorems (AA~, SAS~, SSS~) to prove triangles are similar CCSS: G-SRT.3 MACLE: GSR.1.A Approved 7-15-13 Revised 2013 13 Geometry G-C.1 1. Prove that all circles are similar G-SRT.5 5. Use congruence and similarity criteria for triangles to solve problems and to prove relationships in geometric figures • Use theorems, postulates, or definitions to prove theorems about triangles, including the Side Splitter Theorem and its converse CCSS: G-SRT.4 MACLE: GSR.1.A; M.2.B • Prove that all circles are similar by showing that for a dilation centered at the center of a circle, the preimage and the image have equal central angle measures CCSS: G-C.1 MACLE: GSR.1.A • • • • Perform dilation with a given center and scale factor on a figure in the coordinate plane Verify that when a side passes through the center of dilation, the side and its image lie on the same line Verify that corresponding sides of the preimage and image are parallel Identify if a scale factor reduces or enlarges an image CCSS: G-SRT.1 MACLE: GSR.1.A; GSR.3.A • • Use triangle similarity to solve problems (indirect measure, missing sides/angle measures, side splitting) Use similarity ratios for sides, perimeters, and areas to find missing measures CCSS: G-SRT.5 MACLE: GSR.1.A Approved 7-15-13 Revised 2013 14 Geometry Instructional Strategies • • • • • Lecture enhanced with: • SMART Notebook • PowerPoint • the Internet Drill and guided practice Reflective discussion Class discussion Game: Jeopardy game on: • congruence • similarity • dilations (under development) Assessments/Evaluations The students will be assessed on the concepts taught using a variety of modalities: • Direct teacher observations • Projects with scoring guides: • The students will design a scale-down version of a new high school for the Jefferson City Public Schools • The teacher will provide an entry document that will provide the necessary information to students to get started on their project (under development) • Quizzes • Homework assignments • Formal common assessment – Unit E test Mastery Level: 80% Approved 7-15-13 Revised 2013 15 Geometry Instructional Resources/Tools • • • • Textbook(s): Bass et al., Prentice Hall Mathematics Geometry. Boston: Pearson/Prentice Hall, 2004. Website(s): www.khanacademy.org Scientific calculator Computer simulation software: • Congruence • Similarity apps, if available Approved 7-15-13 Revised 2013 16 Geometry Conceptual Category(s) Domain Cluster Alignments: CCSS: See below Performance: 1.6, 1.10, 3.4 Knowledge: (MA) 2,4 MACLE: See below NETS: 3d; 4c; 6b DOK: 1-3 • • • • Geometry Similarity, Right Triangles, and Trigonometry (G-SRT) Prove theorems involving similarity (G-SRT.4) Define trigonometric ratios and solve problems involving right triangles (G-SRT.6-8) Standards G-SRT.4, 6-8 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 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 7. Explain and use the relationship between the sine and cosine of complementary angles 8. Use trigonometric ratios and the Pythagorean Theorem to solve right triangles in applied problems Learning Targets Unit F: Right Triangle Trigonometry: Solve problems involving right triangles using the Pythagorean Theorem and its converse, geometric mean, or trigonometric ratios • • • Prove the Pythagorean using triangle similarity Use the Pythagorean Theorem to find the missing length of a right triangle Use the Converse of the Pythagorean Theorem to determine if a triangle is right, acute or obtuse CCSS: G-SRT.4,8 MACLE: GSR.1.A • Use the properties of 45-45-90 and 30-60-90 triangles to determine missing sides of a triangle CCSS: G-SRT.6 MACLE: M.2.B • Use the concept of geometric mean to find missing lengths in right triangles CCSS: G-SRT.6 MACLE: M.1 Approved 7-15-13 Revised 2013 17 Geometry • • Use sine, cosine and tangent ratios to determine side lengths and angles in right triangles Use angles of elevation/depression to solve problems CCSS: G-SRT.7 MACLE: GSR.1.A Instructional Strategies • • • • • • • • Lecture enhanced with: • SMART Notebook • PowerPoint • the Internet • Applets • Geometer’s Sketchpad (or similar software) Guided and independent practice Demonstrations: e.g., Proving the Pythagorean Theorem using similarity and areas – see the website Problem solving: e.g., Finding the height of a flag pole, or other structure on school grounds, using trigonometric ratios Reflective discussion Class discussion Computer assisted instruction (may be used with Geometer’s Sketchpad or similar software) Station review Assessments/Evaluations The students will be assessed on the concepts taught using a variety of modalities: • Direct teacher observations • Project with scoring guides: “Light for All Seasons” project – adapted from: Discovering Geometry, Key Curriculum Press, Serra, 2008 (under development) • Quizzes • Homework assignments: see pacing guide • Formal common assessment – Unit F test Mastery Level: 80% Approved 7-15-13 Revised 2013 18 Geometry Instructional Resources/Tools • • • Textbook: Bass et al., Prentice Hall Mathematics Geometry. Boston: Pearson/Prentice Hall, 2004. Website(s): • Similar right triangles and the geometric mean applet (2013) • http://www.mathwarehouse.com/geometry/similar/triangles/geometric-mean.php • Proof of the Pythagorean Theorem with animation (2013) • http://jwilson.coe.uga.edu/emt669/student.folders/morris.stephanie/emt.669/essay.1/pythagorean.html • Trigonometry angles of elevation/depression practice (2013) • http://illuminations.nctm.org/LessonDetail.aspx?id=L383 Scientific calculator Approved 7-15-13 Revised 2013 19 Geometry Conceptual Category(s) Domain Cluster Alignments: CCSS: See below Performance: 1.10, 1.6 Knowledge: (MA) 2 MACLE: See below NETS: 3d; 4c; 6b DOK: 1-4 • • • • • • Geometry Geometric Measurement and Dimension (G-GMD) Modeling with Geometry (G-MG) Explain volume formulas and use them to solve problems (G-GMD.3) Visualize relationships between two-dimensional and three-dimensional objects (G-GMD.4) Apply geometric concepts in modeling situations (G-MG.1-3) Standards G-GMD.3, 4: 3. Use volume formulas for cylinders, pyramids, cones and spheres to solve problems 4. Identify the shapes of two-dimensional cross-sections of threedimensional objects and identify three-dimensional objects generated by rotations of two-dimensional objects G-MG.1-3: 1. Use geometric shapes, their measures, and their properties to describe objects 2. Apply concepts of density based on area and volume in modeling situations 3. Apply geometric methods to solve design problems Learning Targets Unit G: Area, Surface Area, and Volume: Find and apply area, surface area and volume of various two and three-dimensional figures • Find and apply the area of triangles, quadrilaterals and regular polygons CCSS: G-MG.2 MACLE: M.2.C • • Identify the cross sections of three-dimensional objects Identify the three-dimensional figure whose cross section is given CCSS: G-GMD.4 MACLE: M.2.C • Find and use surface area and volume of spheres, prisms, cylinders, pyramids and cones CCSS: G-GMD.3 MACLE: M.2.C Approved 7-15-13 Revised 2013 20 Geometry • Approximate surface area and volume of real-world objects CCSS: G-MG.1 MACLE: M.2.C Instructional Strategies • • • • • Lecture enhanced with: • SMART Notebook • PowerPoint • internet practice Drill and guided practice Demonstrations: • Net Packaging Explorer (in SMART Notebook) • Three-dimensional manipulatives Reflective discussion Class discussion Assessments/Evaluations The students will be assessed on the concepts taught using a variety of modalities: • Direct teacher observations • Quizzes • Homework assignments • Formal common assessment – Unit G test Mastery Level: 80% Approved 7-15-13 Revised 2013 21 Geometry Instructional Resources/Tools Textbook(s): Bass et al., Prentice Hall Mathematics Geometry. Boston: Pearson/Prentice Hall, 2004. Website(s): • http://www.wisc-online.com/Objects/ViewObject.aspx?ID=GEM1304 • http://www.regentsprep.org/Regents/math/ALGEBRA/AS2/PracSol.htm • http://www.ixl.com/math/geometry/surface-area-of-prisms-and-cylinders • http://www.ixl.com/math/geometry/surface-area-of-pyramids-and-cones • http://www.ixl.com/math/geometry/volume-of-prisms-and-cylinders • http://www.ixl.com/math/geometry/volume-of-pyramids-and-cones • http://www.ixl.com/math/geometry/surface-area-and-volume-of-spheres • http://www.ixl.com/math/geometry/surface-area-and-volume-of-similar-solids • Scientific calculator • • Approved 7-15-13 Revised 2013 22 Geometry Conceptual Category(s) Domain Cluster Alignments: CCSS: See below Performance: 1.6, 3.4 Knowledge: (MA) 2 MACLE: See below NETS: 1a; 4b DOK: 1-3 • • • • • • Geometry Circles (G-C) Congruence (G-CO) Understand and apply theorems about circles (G-C.2-5) Experiment with transformations in the plane (G-CO.1) Make geometric constructions (G-CO.13) Standards G-C.2-5 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 3. Construct the inscribed and circumscribed circles of a triangle, and prove properties of angles for a quadrilateral inscribed in a circle 4. (+) Construct a tangent line from a point outside a given circle to the circle 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 constant of proportionality; derive the formula for the area of a sector G-CO.1, 13 1. Know precise definitions of angle, circle, perpendicular line, parallel line, and line segment, based on the undefined notions of point, line, distance along a line, and distance around a circular arc 13. Construct an equilateral triangle, a square, and a regular hexagon inscribed in a circle Approved 7-15-13 Learning Targets Unit H: Circles: Understand and apply theorems about circles • • • • Recall definitions of center, diameter, radius, and circumference Review measures of central angles, inscribed angles, and angles formed by two tangents or a tangent and a chord Find the measures of angles formed by two chords Understand and use the properties of chords CCSS: G-C.2 MACLE: M.2.B • • • • Understand the definitions of tangent and secant Find the measures of angles formed by tangent lines and secant lines Find the measures of angles formed by two secant lines Construct a line tangent to a circle from a point outside the circles CCSS: G-C.2,4 MACLE: M.2.B Revised 2013 23 Geometry • • Circumscribe a circle about a triangle Inscribe a circle in a triangle CCSS: G-C.3 MACLE: M.2.B • • • Understand the properties of quadrilaterals inscribed in a circle Construct a square inscribed in a circle Construct a regular hexagon inscribed in a circle CCSS: G-C.3; G-CO.13 MACLE: M.2.B • • Understand and find the length of an arc of a circle Construct an equilateral triangle in a circle CCSS: G-CO.1; G-CO.13 MACLE: M.2.B • Understand and find the areas of sectors and segments of a circle CCSS: G-C.5 MACLE: M.2.C Instructional Strategies Lecture enhanced with: • SMART Notebook • PowerPoint • Drill and guided practice • Reflective discussion • Class discussion • Approved 7-15-13 Revised 2013 24 Geometry Assessments/Evaluations The students will be assessed on the concepts taught using a variety of modalities: • Direct teacher observation • Quizzes • Homework assignments • Formal common assessment – Unit H test Mastery Level: 80% Instructional Resources/Tools • • • Textbook: Bass et al., Prentice Hall Mathematics Geometry. Boston: Pearson/Prentice Hall, 2004. Website: http://www.mathwarehouse.com/geometry/circle/index.php Scientific calculator Approved 7-15-13 Revised 2013 25