Complementary and Supplementary Angles

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

If one angle is 30 degrees, what is its complementary angle?

Back

60 degrees.

Front

If one angle is 120 degrees, what is its supplementary angle?

Back

60 degrees.

Front

Are 45 degrees and 45 degrees complementary or supplementary?

Back

Complementary.

Front

Are 90 degrees and 90 degrees complementary or supplementary?

Back

Supplementary.

Front

What is the sum of complementary angles?

Back

90 degrees.

Front

What is the sum of supplementary angles?

Back

180 degrees.

Front

If ∠A + ∠B = 90°, what can we say about ∠A and ∠B?

Back

They are complementary angles.

Front

If ∠C + ∠D = 180°, what can we say about ∠C and ∠D?

Back

They are supplementary angles.