Types & Pairs of Angles

Front

What are vertical angles?

Back

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

Front

Identify a pair of vertical angles from the following: ∠EAF and ∠CAB, ∠CAD and ∠DAE.

Back

∠EAF and ∠CAB are a pair of vertical angles.

Front

What is an adjacent angle?

Back

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

Front

Name an angle adjacent to ∠DAE.

Back

∠EAF is adjacent to ∠DAE.

Front

Choose a pair of adjacent angles: ∠CAD and ∠DAE, ∠EAF and ∠CAB.

Back

∠CAD and ∠DAE are a pair of adjacent angles.

Front

What are supplementary angles?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

Choose a pair of supplementary angles: ∠BAC and ∠CAE, ∠EAF and ∠CAB.

Back

∠BAC and ∠CAE are a pair of supplementary angles.

Front

What are complementary angles?

Back

Complementary angles are two angles whose measures add up to 90 degrees.

Front

Choose a pair of complementary angles: ∠BAC and ∠CAD, ∠EAF and ∠CAB.

Back

∠BAC and ∠CAD are a pair of complementary angles.

Front

What is the sum of the measures of two supplementary angles?

Back

The sum of the measures of two supplementary angles is 180 degrees.