Geometric Figures, Types of Lines, and Angles

Front

What is an angle that measures less than 90 degrees?

Back

Acute angle

Front

What is an angle that measures exactly 90 degrees?

Back

Right angle

Front

What do we call lines that will never cross each other?

Back

Parallel lines

Front

What type of angle is formed when two lines intersect at a right angle?

Back

Right angle

Front

What is an angle that measures more than 90 degrees but less than 180 degrees?

Back

Obtuse angle

Front

What type of angle measures exactly 180 degrees?

Back

Straight angle

Front

What do we call angles that are opposite each other when two lines intersect?

Back

Vertical angles

Front

What is the term for angles that add up to 90 degrees?

Back

Complementary angles

Front

What is the term for angles that add up to 180 degrees?

Back

Supplementary angles

Front

What type of lines intersect at a right angle?

Back

Perpendicular lines