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8 -5

Name

Date

Use a protractor to draw the two described angles

next to each other. What is the measure of the larger

angle they form when they are put together?

1. The measures of the two

angles are 20˚ and 55˚.

2. The measures of the two

angles are 65˚ and 95˚.

20˚

55˚

65˚

95˚

Drawings may vary; 75˚

Drawings may vary; 160˚

Write and solve an equation to find the unknown

angle measure.

Equations may vary.

3.

A

B

90˚

?

E

C

4.

D

?

J

G

K

40˚

© Houghton Mifflin Harcourt Publishing Company

The measure of ∠ABC is 115°.

The measure of ∠DGK is 70˚.

What is the measure of ∠EBC?

What is the measure of ∠DGJ?

90° + x = 115°; 25°

70° - 40° = x; 30°

5. When two 45˚ angles are put together, what kind

of angle will they form?

a right angle

UNIT 8 LESSON 5 Compose and Decompose Angles 183

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