Special Angle Pairs

Front

What are vertical angles?

Back

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

Front

Vertical angles are always:

Back

Congruent.

Front

Which angles are considered vertical angles?

Back

Vertical angles share a vertex and are formed by two intersecting lines.

Front

What do complementary angles add up to?

Back

Complementary angles always add up to 90 degrees.

Front

What do supplementary angles add up to?

Back

Supplementary angles always add up to 180 degrees.

Front

What is the supplement angle to 42°?

Back

The supplement angle to 42° is 138°.

Front

If two angles are supplementary and one angle measures 118°, what is the measure of the other angle?

Back

The other angle measures 62°.

Front

What is the definition of adjacent angles?

Back

Adjacent angles are two angles that share a common side and a common vertex.

Front

What is the relationship between vertical angles?

Back

Vertical angles are equal in measure.

Front

If angle A measures 30°, what is the measure of its complement?

Back

The complement of angle A is 60°.