Geometry Vocabulary

Cube

A 3d shape with 6 equal faces

Rectangular Prism

A 3d object that has 6 rectangular faces and only right angles

Cylinder

A 3d shape that has a round top and bottom and a curved face.

Cone

A 3d shape with a circular bottom and a curved surface

Triangular Prism

A prism with two identical, triangular bases.

Net

A pattern that you can cut and fold to make a model of a solid shape.

Area

The space inside the shape

Perimeter

the shortest distance around a shape

Surface Area

The total area of the surface of a 3d shape

Volume

the amount of space a 3d object has

Circumference

The distance around the area of a circle

Diameter

A straight line going through the center of a circle connecting two points on the circumference

Radius

The distance from the center to the circumference of a circle.

Sphere

A 3d shape that is perfectly round