Angle vocabulary

Front

What are interior angles?

Back

Interior angles are the angles formed inside a polygon by its sides.

Front

Which angles are considered vertical angles?

Back

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

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 90°.

Front

What does it mean for angles to be adjacent?

Back

Adjacent angles are angles that are next to each other but do not overlap.

Front

What are complementary angles?

Back

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

Front

What are supplementary angles?

Back

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

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 90°.

Front

What is an obtuse angle?

Back

An obtuse angle is an angle that measures more than 90° but less than 180°.

Front

What is a straight angle?

Back

A straight angle is an angle that measures exactly 180°.

Front

How do you identify adjacent angles in a diagram?

Back

Adjacent angles share a common vertex and a common side.