# Angles

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## Angles Answer Key

1.

What is smaller than a right angle?

- acute angle
- obtuse angle
- right angle

2.

Two angles whose measures sum to 180°?

- Obtuse Angle
- Right Angle
- Exterior Angle
- Supplementary
- Interior Angle
- Complementary

3.

Which angle is 60 degrees?

- right
- acute
- obtuse
- straight

4.

A right triangle has an angle measuring 38 degrees. Which is the degree measure of another angle of this triangle?

- 52 degrees
- 82 degrees
- 104 degrees
- 142 degrees

5.

What type of angle is this?

- acute
- obtuse
- right

6.

What is the measurement of this angle in degrees?

- 150
- 30
- 180
- 25

7.

What is the measurement of this angle in degrees?

- 115 degrees

8.

You have a 35 degree angle. Determine the complementary angle AND the supplementary angle.

- Complement total is 90, therefore: 90 - 35 = 55, so 55 degrees.

Supplement total is 180, therefore: 180 - 35 = 145, so 145 degrees.

Or, 35 + 55 = 90, and 35 + 145 = 180.

9.

Classify the following angle and justify your answer.

- This is an acute angle because it is less than 90 degrees.

10.

You have a 65 degree angle. Determine the complementary angle AND the supplementary angle.

- Complementary angle is 25 degrees.

Supplementary angle is 115 degrees.

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