Angle pairs

Front

What are complementary angles?

Back

Angles that add up to 90°.

Front

What are supplementary angles?

Back

Angles that add up to 180°.

Front

What are vertical angles?

Back

Angles that are opposite of each other when lines intersect.

Front

What are adjacent angles?

Back

Angles that share a common side and vertex.

Front

If angle A is 30°, what is the measure of its complementary angle?

Back

60°.

Front

If angle B is 120°, what is the measure of its supplementary angle?

Back

60°.

Front

Are the angles 45° and 45° complementary, supplementary, or neither?

Back

Complementary.

Front

Are the angles 100° and 80° complementary, supplementary, or neither?

Back

Supplementary.

Front

What is the relationship between two angles that are both 90°?

Back

They are complementary.

Front

If two angles are supplementary, what is the sum of their measures?

Back

180°.