Angle pairs

Front

What are vertical angles?

Back

Angles that are opposite of each other when lines intersect.

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

If angle A and angle B are complementary, what is the relationship between their measures?

Back

The sum of their measures is 90°.

Front

If angle C and angle D are supplementary, what is the relationship between their measures?

Back

The sum of their measures is 180°.

Front

What is the measure of an angle that is complementary to a 30° angle?

Back

60°.

Front

What is the measure of an angle that is supplementary to a 45° angle?

Back

135°.

Front

Are two angles that share a common vertex and a common side always adjacent?

Back

Yes, they are adjacent angles.

Front

What is the definition of adjacent angles?

Back

Angles that have a common side and a common vertex but do not overlap.

Front

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

Back

They are equal in measure.