Angle Relationship

Front

What are complementary angles?

Back

Angles that add up to 90°.

Front

What are supplementary angles?

Back

Angles that add up to 180°.

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect.

Front

What are adjacent angles?

Back

Angles that share a common side and vertex.

Front

Identify the relationship: ∠A + ∠B = 90°

Back

Complementary angles.

Front

Identify the relationship: ∠C + ∠D = 180°

Back

Supplementary angles.

Front

Which are pairs of vertical angles? ∠COB & ∠AOD or ∠AOD & ∠BOD?

Back

∠COB & ∠AOD.

Front

If ∠1 and ∠2 are vertical angles, what can be said about their measures?

Back

They are equal.

Front

What is the sum of the measures of angles on a straight line?

Back

180°.

Front

What is the sum of the measures of angles around a point?

Back

360°.