Angle Pairs

Front

What are complementary angles?

Back

Two angles that add up to 90 degrees.

Front

What are supplementary angles?

Back

Two angles that add up to 180 degrees.

Front

What are adjacent angles?

Back

Two angles that share a common side and vertex.

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect; they are equal.

Front

How do you find the missing angle in a supplementary pair?

Back

Subtract the known angle from 180 degrees.

Front

How do you find the missing angle in a complementary pair?

Back

Subtract the known angle from 90 degrees.

Front

If angle A is 40 degrees, what is the measure of its supplementary angle?

Back

140 degrees.

Front

If angle B is 72 degrees, what is the measure of its complementary angle?

Back

18 degrees.

Front

What equation represents the relationship of supplementary angles?

Back

x + y = 180.

Front

What equation represents the relationship of complementary angles?

Back

x + y = 90.