1-5 Check Skills

1-5 Exploring Angle Pairs

To identify special angle pairs and use their relationships to find angle measures.

Students will explicitly define and use terms for angles, including “adjacent angles” and “supplementary angles”

Problem 1

36

1-5 Quiz

•The following questions are designed to help you determine how well you understood today’s lesson.

•Remember to ask when you miss more than you get right!

1. Supplementary angles are two angles whose measures have sum ____. Complementary angles are two angles whose measures have sum ____.

A. 90; 180B. 90; 45C. 180; 360D. 180; 90

2. ∠DFG and ∠JKL are complementary angles. m ∠DFG =x + 5, and m ∠JKL = x – 9. Find the measure of each angle.

A. ∠DFG = 47 ∠JKL =53B. ∠DFG = 47 ∠JKL =43C. ∠DFG = 52 ∠JKL =48D. ∠DFG = 52 ∠JKL =38

3. Find the value of x.

A. 19 B. 125C. -19D. 55

4. Name an angle complementary to ∠COD.A. ∠BOC B. ∠BOE C. ∠DOCD.∠BOA

5. Name an angle supplementary to ∠EOD.A. ∠BOC B. ∠BOE C. ∠DOCD.∠BOA

1-5 Homework

•P. 38-39 8-40 even