# Chapter 9: Geometric Figures

Difficulty Level:

**At Grade**Created by: CK-12

## Introduction

In this chapter, students will engage with the following concepts: geometry, angles, triangles, quadrilaterals, polygons, congruent and similar figures, line symmetry, and problem solving using a Venn diagram.

Chapter Outline

- 9.1.
## Basic Geometric Definitions

- 9.2.
## Intersecting and Parallel Lines

- 9.3.
## Identification of Angles by Vertex and Ray

- 9.4.
## Angle Measurement

- 9.5.
## Angle Classifications

- 9.6.
## Supplementary and Complementary Angles

- 9.7.
## Triangle Classification by Angles

- 9.8.
## Triangle Classification by Side Lengths

- 9.9.
## Angle Measures in Given Triangles

- 9.10.
## Quadrilateral Classifications

- 9.11.
## Angle Measures in Given Quadrilaterals

- 9.12.
## Polygon Classifications

- 9.13.
## Classifying Regular and Irregular Polygons

- 9.14.
## Relation of Polygon Sides to Angles and Diagonals

- 9.15.
## Triangle Identification as Similar, Congruent, or Neither

- 9.16.
## Corresponding Parts of Congruent Figures

- 9.17.
## Corresponding Parts of Similar Figures

- 9.18.
## Unknown Measures in Similar Figures

- 9.19.
## Indirect Measurement

- 9.20.
## Line of Symmetry

- 9.21.
## Number Patterns

- 9.22.
## Venn Diagrams

### Chapter Summary

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Description

This chapter covers: geometry, angles, triangles, quadrilaterals, polygons, congruent and similar figures, line symmetry, and problem solving using a Venn diagram.

Difficulty Level:

At Grade
Tags:

acute
angle
angle pair
(26 more)
CK.MAT.ENG.SE.1.CK-12-Middle-School-Math-Concepts---Grade-6.9
complementary
congruent
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diagonal
indirect measurement
intersecting lines
irregular polygon
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line segment
Line Symmetry
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Parallel Lines
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right
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straight
supplementary
triangle
Venn diagram
vertex

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Line Symmetry
Parallel Lines
vertex
(26 more)
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CK.MAT.ENG.SE.1.CK-12-Middle-School-Math-Concepts---Grade-6.9

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Date Created:

Nov 19, 2014
Last Modified:

Today, 08:14
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