Angle Relationships 8.5

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 adjacent angles?

Back

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

Front

What are vertical angles?

Back

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

Front

If two angles are complementary, what is their sum?

Back

The sum of two complementary angles is 90 degrees.

Front

If two angles are supplementary, what is their sum?

Back

The sum of two supplementary angles is 180 degrees.

Front

What is the relationship between adjacent angles and supplementary angles?

Back

Adjacent angles can be supplementary if they add up to 180 degrees.

Front

How can you identify vertical angles in an intersecting line diagram?

Back

Vertical angles are formed by the intersection of two lines and are located opposite each other.

Front

If one angle measures 30 degrees, what is the measure of its complementary angle?

Back

The complementary angle measures 60 degrees (90 - 30 = 60).

Front

If one angle measures 110 degrees, what is the measure of its supplementary angle?

Back

The supplementary angle measures 70 degrees (180 - 110 = 70).