Complementary and Supplementary Angles

Front

What are complementary angles?

Back

Two angles that add up to 90 degrees.

Front

What are supplementary angles?

Back

Two angles that add up to 180 degrees.

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect; they are equal.

Front

If m∠A + m∠B = 90°, what type of angles are A and B?

Back

Complementary angles.

Front

If m∠C + m∠D = 180°, what type of angles are C and D?

Back

Supplementary angles.

Front

If m∠1 = 30°, what is m∠2 if ∠1 and ∠2 are complementary?

Back

m∠2 = 60°.

Front

If m∠3 = 150°, what is m∠4 if ∠3 and ∠4 are supplementary?

Back

m∠4 = 30°.

Front

What is the relationship between vertical angles?

Back

Vertical angles are equal.

Front

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

Back

50°.

Front

If m∠5 = 120°, what is m∠6 if ∠5 and ∠6 are vertical angles?

Back

m∠6 = 120°.