Angle Pairs

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

Back

60 degrees (90 - 30 = 60).

Front

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

Back

60 degrees (180 - 120 = 60).

Front

What is the equation to find the missing angle x if angle A is 40 degrees and they are supplementary?

Back

x + 40 = 180.

Front

What is the equation to find the missing angle x if angle A is 40 degrees and they are complementary?

Back

x + 40 = 90.

Front

If two angles are equal and they are complementary, what is the measure of each angle?

Back

45 degrees (since 45 + 45 = 90).

Front

What is the value of x if 2x + 10 = 90?

Back

40 (2x = 80, x = 40).

Front

What is the value of x if 3x + 15 = 180?

Back

55 (3x = 165, x = 55).

Front

If angle A is 4 degrees greater than angle B and they are complementary, what are the measures of angles A and B?

Back

Angle A = 47 degrees, Angle B = 43 degrees.