Angle Relationships

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

If one angle measures 55 degrees, what is the measure of its vertical angle?

Back

55 degrees.

Front

What is the sum of the measures of complementary angles?

Back

90 degrees.

Front

What is the sum of the measures of supplementary angles?

Back

180 degrees.

Front

If two angles form a linear pair, what is true about their measures?

Back

They are supplementary.

Front

What is the relationship between adjacent angles?

Back

They share a common vertex and a side.

Front

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

Back

60 degrees.

Front

If angle B is 120 degrees, what is the measure of its supplementary angle?

Back

60 degrees.