Complementary, Supplementary, and Vertical Angles

Front

What are complementary angles?

Back

Two angles that add up to 90°.

Front

What are supplementary angles?

Back

Two angles that add up to 180°.

Front

What are vertical angles?

Back

Angles that are opposite/across from each other when lines intersect.

Front

What are adjacent angles?

Back

Angles that share a common side and vertex.

Front

If two angles are complementary and one angle measures 30°, what is the measure of the other angle?

Back

60°.

Front

If two angles are supplementary and one angle measures 110°, what is the measure of the other angle?

Back

70°.

Front

What is the relationship between vertical angles?

Back

Vertical angles are always equal.

Front

If ∠A and ∠B are vertical angles, and ∠A measures 45°, what is the measure of ∠B?

Back

45°.

Front

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

Back

90°.

Front

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

Back

180°.