Download Geometry 9 - Piscataway High School

Geometry
Piscataway High School
Teacher:
Mr. Hale
Email:
[email protected]
Course Title: Geometry 9
Textbook:
Geometry (2015), HMH (Kanold, Burger, et al.)
Course Overview
Full year course: 5.0 credits
Prerequisite: Algebra 1
Description: Geometry is a college prep course that uses constructions and transformations to explore
geometric relationships and figures. Students will use formal logic and various forms of proof in order
to explore topics such as congruence and similarity, properties of geometric shapes, measurement of
plane and solid figures, and trigonometry.
The Geometry course is structured as follows:
Unit
Topic
Length
Unit 1
Constructions and Introduction to Geometry
7 Days
Unit 2
Isometry and Transformations
14 Days
Unit 3
Introduction to Reasoning and Proofs
13 Days
Unit 4
Triangles and Triangle Congruence
15 Days
Unit 5
Quadrilaterals and Coordinate Proofs
10 Days
Unit 6
Similarity
15 Days
Unit 7
Right Triangles and Trigonometry
13 Days
Unit 8
Circles
20 Days
Unit 9
Modeling in Three Dimensions
12 Days
Unit 10
Analytic Geometry
8 days
1
Geometry Scope and Sequence
Unit
Timing
Topic
(1 day = 1 hour)
Concepts and Skills
Assessment for Units 1 and 2 administered by the end of Cycle 5
Unit 1
7 Days
Introduction to
Geometry
HSG.CO.A.1
HSG.CO.D.12
[1.1 & 1.2]
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Unit 2
14 Days
HSG.CO.A.2
HSG.CO.A.3
HSG.CO.A.4
HSG.CO.A.5
HSG.CO.A.6
HSG.CO.B.6
HSG.CO.B.7
Isometry and
Transformations
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[1.3, Modules 2 & 3]
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Identify basic geometry vocabulary (points, lines, planes)
Use undefined terms such as points, lines and planes to create axiomatic system to build
other defined geometric terms (i.e. line segment, ray, coplanar, parallel, collinear, postulate,
midpoint, segment bisector)
Construct a copy of a line segment (discuss radius of circles when doing construction) and
find the length using the distance formula (Pythagorean Theorem).
Use the construction of copying a line to discuss the Segment Addition postulate and solve
problems.
Construct a bisector of a segment (midpoint) and use the midpoint formula.
Identify vocabulary related to angles (angles, vertex, classifying angles, angle bisector)
Name angles based on proper notation (ex: 𝑚∠𝑚𝑚𝑚 is the same as 𝑚∠𝑚𝑚𝑚)
Constructions - copy angle, bisect angle (options: with compass and straightedge, string,
paper folding, and technology, tracing paper) – in conjunction w/book.
Use Segment and Angle Addition Postulates
Identify vocabulary related to transformations (image, preimage, rigid transformation,
translation, reflection, rotation).
Rigid Transformations
o Translations (using vectors), reflections, and rotations
o Perform transformations both on and off the coordinate plane
o Use coordinate notation to map points from preimage to image and vice versa.
o Use slope and midpoint formulas to find the equation of the line of reflection
o Use tracing paper investigations for translation and reflection/ruler and protractor for
rotation -(refer to lessons 2.1, 2.2, 2.3)
Identify lines of symmetry and angles of rotational symmetry for figures
Perform sequences of transformations to map congruent figures onto one another
Given a sequence of transformations, identify the sequence of coordinates using the proper
notation.
Define congruence through rigid transformations on the coordinate plane and validate using
distance formula and midpoint formula
Use proper notation to write congruence statements for congruent figures and identify
corresponding parts of congruent figures (ex: ∠𝑚𝑚𝑚 ≅ ∠𝑚𝑚𝑚)
Discuss and apply congruence properties and use congruent corresponding parts in a proof.
Assessment for Unit 3 administered by the end of Cycle 7
Unit 3
13 Days
HSG.CO.C.9
HSG.CO.D.12
HSG.GPE.B.5
Introduction to
Reasoning and
Proofs
[1.4, Module 4]
Mandatory
Performance Tasks:
Lesson 4.2 (p. 184) –
Do after Lesson 4.3
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Review properties of angles (complements, supplements, vertical angles, linear pairs)
Identify vocabulary related to reasoning (inductive reasoning, deductive reasoning,
conjecture, theorem, conditional statements and counterexamples)
Discuss postulates about Lines and Planes
Complete simple proofs and algebraic proofs using properties and postulates to justify
statements (refer to examples in book and dropbox)
Prove vertical angles are congruent using the proof method of your choice (for all proofs).
Review parallel line properties and angle relationships (corresponding, alternate interior,
alternate exterior, consecutive/same-side interior)
o Prove angle theorems related to parallel lines cut by a transversal
Discuss converse statements
o Prove that two lines are parallel for angle relationships.
Construct a line parallel to a given line
o Prove the construction using the Converse of the Corresponding Angles Theorem
Construct perpendicular bisectors
o Prove all points on a perpendicular bisector are equidistant from the endpoints of the
segment (Perpendicular Bisector Theorem)
Graph, find the slope of, and write equations for perpendicular and parallel lines
Geometry Scope and Sequence
Unit
Timing
Topic
(1 day = 1 hour)
Concepts and Skills
Assessment for Unit 4 administered by the end of Cycle 10
Unit 4
15 Days
HSG.CO.C.10
HSG.CO.B.7
HSG.CO.B.8
HSG.CO.D.12
Triangles and
Triangle
Congruence
[Module 7(intro), 5, 6,
7]
Mandatory
Performance Tasks:
6.2 (p. 294)
Vocabulary embedded within each module – begin with defining and constructing Isosceles and
Equilateral Triangles to use in Module 5 (Module 7.2).
 Triangle Congruence Theorems [Modules 5 & 6]
o AAS, ASA, SSS, SAS, HL congruence theorems
o Prove triangles congruent using two-column, paragraph, and coordinate proofs
o Use rigid motions to map congruent figures onto one another
o Use corresponding Parts of Congruent Triangles are Congruent in proofs
o Justify angle bisector and perpendicular bisector constructions using triangle
congruence
 Triangle Theorems [Module 7.1 & 7.2] – use the following theorems in proofs as well as
algebraic examples
o Triangle Sum Theorem (using auxiliary lines), Polygon Angle Sum Theorem (using
auxiliary diagonals), Exterior Angle Theorem, Isosceles Triangle Theorem (Base
Angle Theorem), Equilateral Triangle Theorem
Assessment for Unit 5 administered by the end of Cycle 12
Unit 5
10 Days
HSG.CO.C.11
HSG.GPE.B.4
HSG.GPE.B.5
HSG.GPE.B.7
Quadrilaterals
and Coordinate
Proofs
[Module 9, 10]
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Review properties of quadrilaterals
o Parallelogram, rectangle, rhombus, square, trapezoid, isosceles trapezoid, kite
o Discuss sufficient criteria to classify a quadrilateral
Coordinate Proofs
o Review distance formula and midpoint formula
o Review slopes of parallel and perpendicular lines
o Use distance, midpoint, and/or slopes to classify quadrilaterals in the coordinate plane
o Perform coordinate proofs to identify the type of quadrilaterals on the coordinate plane
o Calculate area and perimeter of triangles and quadrilaterals on and off of the
coordinate plane
Assessment for Unit 6 administered by the end of Cycle 15
Unit 6
15 Days
Similarity
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HSG.SRT.A.1
HSG.SRT.A.1.A
HSG.SRT.A.1.B
HSG.SRT.A.2
HSG.SRT.A.3
HSG.SRT.B.4
HSG.SRT.B.5
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[Module 11, 12, 8.4]
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Define similarity and create similarity statements using proper notation (ex:
∆𝑚𝑚𝑚~∆𝑚𝑚𝑚).
Discuss similarity through the use of dilations:
o Dilations completed from the origin and other points on coordinate plane
o Scale factor and center of dilation to explain similarity
o List corresponding parts (congruent or proportional)
o Finding the center of dilation given a dilation on a coordinate plane
o Prove all circles are similar
o Subdivide a Segment in a Given Ratio (partition a line using different ratios)
Establish Triangle Similarity Postulates
o AA, SAS, SSS (prove using above discussions/activities)
o Discuss similarity through the definition of midsegments of a triangle and prove the
triangle midsegment theorem using similarity
(http://mathbitsnotebook.com/Geometry/SegmentsAnglesTriangles/SATMidSegments.html)
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o Prove Triangle Proportionality Theorem (include midsegments & coordinate proofs)
Modeling: Using triangle similarity to solve indirect measurement problems
Similarity in right triangles using altitude (Lesson 12.4)
Geometry Scope and Sequence
Unit
Timing
Topic
(1 day = 1 hour)
Concepts and Skills
Assessment for Unit 7 administered by the end of Cycle 18
Unit 7
13 Days
HSG.SRT.C.6
HSG.SRT.C.7
HSG.SRT.C.8
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Trigonometry
[Module 13]
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Review & prove Pythagorean Theorem
Prove the Converse to the Pythagorean Theorem
Discuss Special Right trianngles.
Use similar triangles to define trigonometric ratios and their inverses in right triangles
o Demonstrate and apply relationship and sine and cosine of complementary angles
o Discuss range of trig ratios (e.g., certain ratios cannot have a value over 1)
Apply trigonometry and Pythagorean Theorem to solve word problems
o Include angles of elevation and depression (examples in Dropbox)
Calculate area and perimeter of triangles, using trig to find altitudes
Assessment for Unit 8 administered by the end of Cycle 22
Unit 8
20 Days
HSG.CO.A.1
HSG.GPE.A.1
HSG.C.A.1
HSG.C.A.2
HSG.C.A.4
HSG.C.B.5
HSG.CO.D.13
Circles
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[Lessons 17.1, 15.115.3, 15.4 (chords
only), 15.5, 16.2, 16.3]
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Review definition of circle and associated vocabulary
Use definition of circle to derive equation
o Complete the square to find radius and center
Review Constructions of inscribed and circumscribed polygons
o Prove properties of angles for a quadrilateral inscribed in a circle (opposite angles are
supplementary)
Identify Circle relationships
o Relationship between inscribed, central, and circumscribed angles
o Inscribed angles on diameter
o Radius is perpendicular to tangent at point of intersection
Find arc length and sector area
o Include application problems
o Define radians
Include informal discussion of area and perimeter of circumscribed polygons (limits, as the
number of sides increases what happens?)
Construct a square in a circle [15.2]
https://www.khanacademy.org/math/geometry/geometric-constructions/polygonsinscribed-in-circles/v/constructing-square-inscribed-in-circle
Assessment for Units 9 & 10 administered by the end of Cycle 25 (time permitting)
Unit 9
12 Days
HSG.GMD.A.1
HSG.GMD.A.3
HSG.GMD.B.4
HSG.MG.A.1
HSG.MG.A.2
HSG.MG.A.3
HSG.GPE.A.2
Modeling in
Three
Dimensions
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[Lesson 17.2, Module
18, 19, 20]
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Unit 10
8 days
Analytical
Geometry
HSG.C.A.3
[Module 8]
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Relationships between 2D and 3D Shapes
o Identify nets and review surface area
o Discuss cross sections of conic
o Derive equation of parabola (with directrix & focus)
o Identify 3-D objects created by rotating 2-D objects
Discuss volume using Cavalieri’s Principle
o Informal limit process to find formulas
o Volume of prisms, pyramids, cones and spheres
o Volume of compound figures
Complete application problems with 3-D shapes regarding surface area and volume
o Density; Designing packaging to maximize volume or minimize surface area
Inscribed and Circumscribed Triangles [Module 8]
o Construct circumscribed and inscribed circles of a triangle and justify using the
theorems
o Locate circumcenter and incenter of a triangle on the coordinate plane
o Theorem: Medians of a Triangle meet at a point (prove using construction)
o Application of incenter, circumcenter, and median