Finding the Missing Angle

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 sum of the measures of complementary angles?

Back

90 degrees.

Front

What is the sum of the measures of supplementary angles?

Back

180 degrees.

Front

Find the value of x if angle 1 is 35 degrees and angle 2 is x degrees, and they are complementary.

Back

x = 55 degrees (90 - 35 = 55).

Front

Find the value of x if angle 1 is 110 degrees and angle 2 is x degrees, and they are supplementary.

Back

x = 70 degrees (180 - 110 = 70).

Front

What is an example of a pair of complementary angles?

Back

45° and 45° (45 + 45 = 90).

Front

What is an example of a pair of supplementary angles?

Back

100° and 80° (100 + 80 = 180).