Geometry Terms 4th grade

Front

What is an angle that is less than 90 degrees?

Back

An acute angle.

Front

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

Back

An obtuse angle.

Front

What do you call a part of a line with two endpoints?

Back

A line segment.

Front

How many sides does a quadrilateral have?

Back

4 sides.

Front

What are lines that cross at a point called?

Back

Intersecting lines.

Front

What is an angle that measures exactly 90 degrees?

Back

A right angle.

Front

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

Back

Parallel lines.

Front

What is a straight line that extends infinitely in one direction?

Back

A ray.

Front

What is the term for a flat surface that extends infinitely in all directions?

Back

A plane.

Front

What do you call a shape with three sides?

Back

A triangle.