4th Grade Geometry Vocabulary

Front

hexagon

Back

A polygon with 6 sides.

Front

point

Back

An exact location in space.

Front

plane

Back

A flat surface that goes forever in all directions.

Front

obtuse angle

Back

An angle that is greater than a right angle, but less than 180 degrees.

Front

right triangle

Back

A triangle in which there is one right angle.

Front

polygon

Back

A closed figure with straight sides.

Front

acute angle

Back

An angle that is less than 90 degrees.

Front

perimeter

Back

The distance around a shape.

Front

area

Back

The amount of space inside a shape.

Front

circle

Back

A round shape with no corners, where every point is the same distance from the center.