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 of each other when lines intersect.

Front

What type of angle is 90°?

Back

Right angle.

Front

What type of angle is less than 90°?

Back

Acute angle.

Front

What type of angle is greater than 90° but less than 180°?

Back

Obtuse angle.

Front

What type of angle is exactly 180°?

Back

Straight angle.

Front

What are adjacent angles?

Back

Angles that share a common side and vertex.

Front

If two angles are complementary, what is the sum of their measures?

Back

90°.

Front

If two angles are supplementary, what is the sum of their measures?

Back

180°.