Lines, Angles, Triangles and Quadrilaterals

Front

What type of triangle has all angles less than 90 degrees?

Back

Acute triangle

Front

What type of angle measures exactly 90 degrees?

Back

Right angle

Front

What type of angle measures more than 90 degrees but less than 180 degrees?

Back

Obtuse angle

Front

What do you call lines that never meet and are always the same distance apart?

Back

Parallel lines

Front

What is a line segment?

Back

A piece of a line that has two endpoints.

Front

What type of triangle has one angle that is greater than 90 degrees?

Back

Obtuse triangle

Front

What is the sum of the angles in any triangle?

Back

180 degrees

Front

What do you call a triangle with one right angle?

Back

Right triangle

Front

What is a reflex angle?

Back

An angle that measures more than 180 degrees.

Front

What is an acute angle?

Back

An angle that measures less than 90 degrees.