# Chapter 3: Parallel and Perpendicular Lines

Difficulty Level:

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

In this chapter, you will explore the different relationships formed by parallel and perpendicular lines and planes. Different angle relationships will also be explored and what happens when lines are parallel. You will start to prove lines parallel or perpendicular using a fill-in-the-blank 2-column proof. There is also an algebra review of the equations of lines, slopes, and how that relates to parallel and perpendicular lines in geometry.

## Chapter Outline

- 3.1. Lines and Angles
- 3.2. Properties of Parallel Lines
- 3.3. Proving Lines Parallel
- 3.4. Properties of Perpendicular Lines
- 3.5. Parallel and Perpendicular Lines in the Coordinate Plane
- 3.6. The Distance Formula
- 3.7. Chapter 3 Review
- 3.8. Study Guide

### Chapter Summary

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## Description

This chapter covers the properties of parallel and perpendicular lines. Students are also exposed to more two-column proofs as well as a review of the algebraic equations of lines and slopes.

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## Date Created:

Feb 22, 2012## Last Modified:

Apr 29, 2014
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