Angle Relationships

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 ∠A = 35°, what is the measure of its complementary angle?

Back

55°

Front

If ∠B = 120°, what is the measure of its supplementary angle?

Back

60°

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 ∠C + ∠D = 90° and ∠C = 30°?

Back

x = 60°.

Front

What is the measure of an angle that is 45° less than its supplementary angle?

Back

The angle measures 22.5°.

Front

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

Back

Each angle measures 90°.

Front

What is the relationship between vertical angles?

Back

Vertical angles are equal in measure.

Front

If ∠E = 47°, what is the measure of the missing angle if ∠F is supplementary to ∠E?

Back

∠F = 133°.