Vertical, Complementary and Supplementary Angles Practice 1-2

Front

What is an obtuse angle?

Back

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

Front

What are vertical angles?

Back

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

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

Give an example of a pair of complementary angles.

Back

81° and 9° are complementary angles because 81° + 9° = 90°.

Front

Give an example of a pair of supplementary angles.

Back

120° and 60° are supplementary angles because 120° + 60° = 180°.

Front

What is a right angle?

Back

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

Front

What is an acute angle?

Back

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

Front

If two angles are vertical angles, what can we say about their measures?

Back

If two angles are vertical angles, their measures are equal.

Front

What is the relationship between adjacent angles?

Back

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