Complementary, Supplementary, Vertical, Adjacent Angles

Front

What are adjacent angles?

Back

Adjacent angles are two angles that share a common side and a common vertex, and do not overlap.

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

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always equal.

Front

If m∠A = 40°, what is m∠B if ∠A and ∠B are complementary?

Back

m∠B = 50° (because 90° - 40° = 50°).

Front

If m∠C = 120°, what is m∠D if ∠C and ∠D are supplementary?

Back

m∠D = 60° (because 180° - 120° = 60°).

Front

What is the relationship between vertical angles?

Back

Vertical angles are equal in measure.

Front

If two angles are adjacent and one measures 70°, what could the measure of the other angle be if they are supplementary?

Back

The other angle could measure 110° (because 180° - 70° = 110°).

Front

What is an example of complementary angles?

Back

An example is 30° and 60° because 30° + 60° = 90°.

Front

What is an example of supplementary angles?

Back

An example is 100° and 80° because 100° + 80° = 180°.