Finding Unknown Angle Measures

Front

What is the measure of a right angle?

Back

A right angle measures 90 degrees.

Front

What do you call two angles that add up to 90 degrees?

Back

Complementary Angles.

Front

What do you call two angles that add up to 180 degrees?

Back

Supplementary Angles.

Front

If angle A is 60 degrees, what is the measure of its complementary angle?

Back

The complementary angle is 30 degrees.

Front

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

Back

The supplementary angle is 60 degrees.

Front

What is the sum of the angles in a triangle?

Back

The sum of the angles in a triangle is always 180 degrees.

Front

What is the value of x if angle x + 45 degrees = 90 degrees?

Back

x = 45 degrees.

Front

What is the value of x if angle x + angle y = 180 degrees and angle y = 70 degrees?

Back

x = 110 degrees.

Front

What is the measure of angle Z if it is supplementary to a 38 degree angle?

Back

Angle Z measures 142 degrees.

Front

What is the measure of angle x if it is complementary to a 28 degree angle?

Back

Angle x measures 62 degrees.