Complementary and Supplementary Angles Flashcard

Front

What are complementary angles?

Back

Complementary angles are two angles whose measures add up to 90 degrees.

Front

What are supplementary angles?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

If one angle measures 30 degrees, what is the measure of its complementary angle?

Back

60 degrees (90 - 30 = 60).

Front

If one angle measures 110 degrees, what is the measure of its supplementary angle?

Back

70 degrees (180 - 110 = 70).

Front

Solve for x: x + 25 = 90

Back

x = 65.

Front

Solve for x: x + 45 = 180

Back

x = 135.

Front

If two angles are complementary and one angle measures 40 degrees, what is the other angle?

Back

50 degrees (90 - 40 = 50).

Front

If two angles are supplementary and one angle measures 150 degrees, what is the other angle?

Back

30 degrees (180 - 150 = 30).

Front

Determine if the angles 75 degrees and 15 degrees are complementary or supplementary.

Back

They are complementary (75 + 15 = 90).

Front

Determine if the angles 120 degrees and 60 degrees are complementary or supplementary.

Back

They are supplementary (120 + 60 = 180).