Adjacent, Vertical, Complementary, Supplementary Angles

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

What are adjacent angles?

Back

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

Front

If angle A measures 30° and angle B measures 60°, what is the relationship between them?

Back

They are complementary angles because 30° + 60° = 90°.

Front

If angle C measures 120° and angle D measures 60°, what is the relationship between them?

Back

They are supplementary angles because 120° + 60° = 180°.

Front

If two angles are vertical angles, what can you say about their measures?

Back

Vertical angles are equal in measure.

Front

If angle E measures 45° and angle F measures 135°, what is the relationship between them?

Back

They are supplementary angles because 45° + 135° = 180°.

Front

What is the measure of the missing angle if one angle is 70° and they are complementary?

Back

The missing angle is 20° because 70° + 20° = 90°.

Front

If angle G measures 80° and angle H measures 100°, what is the relationship between them?

Back

They are supplementary angles because 80° + 100° = 180°.