7R Angle Relationships Practice

Front

What are complementary angles?

Back

Angles that add up to 90°.

Front

What is the measure of angle 1 if angle 2 is 105°?

Back

Angle 1 = 75° (since 90° - 105° = -15°, which is not possible, so angle 1 must be 75° to make them complementary).

Front

Name a pair of complementary angles.

Back

∠1 and ∠2.

Front

If m∠1 = 30°, what is m∠3 if they are complementary?

Back

m∠3 = 60°.

Front

Identify the relationship between two angles that add up to 90°.

Back

Complementary.

Front

What are supplementary angles?

Back

Angles that add up to 180°.

Front

If m∠A + m∠B = 180°, what type of angles are A and B?

Back

Supplementary angles.

Front

What is the measure of angle 2 if angle 1 is 45° and they are complementary?

Back

Angle 2 = 45°.

Front

If two angles are vertical, what can be said about their measures?

Back

They are equal.

Front

What is the sum of the measures of two complementary angles?

Back

90°.