3.2+Proof+&+Perpendicular+Lines

**Chapter 3 Section 2**
By: Stephanie Stein & Sung Jin Kim

Use a protractor to figure out what the measure of each angle. 1. <y 2. <x 3. <z 4. <R 5. <S 6. <P
 * Right Angle:** 90 degrees.
 * Acute Angle:** 1-89 degrees.
 * Obtuse Angle:** 91-179 degrees.
 * Straight Line:** 180 degrees.

**Goal 2: Proving Results About Perpendicular Lines**
=**Practice Problems:**= Write a different proof for each problem. 1.

2.

3.

http://www.homeschoolmath.net/teaching/g/parallel_and_perpendicular.php

http://www.purplemath.com/modules/strtlneq3.htm