Lines and Angles in Shapes

Front

What is an angle that forms a square corner called?

Back

A right angle.

Front

What are lines that never intersect and are always the same distance apart called?

Back

Parallel lines.

Front

What type of angle measures less than 90 degrees?

Back

Acute angle.

Front

What do you call lines that intersect at a right angle?

Back

Perpendicular lines.

Front

What is the name of a triangle that has one right angle?

Back

Right triangle.

Front

What is the sum of the interior angles of a triangle?

Back

180 degrees.

Front

What is the term for angles that are opposite each other when two lines intersect?

Back

Vertical angles.

Front

What type of angle measures exactly 90 degrees?

Back

Right angle.

Front

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

Back

Supplementary angles.

Front

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

Back

Complementary angles.