Geometry Vocabulary

The distance around a two-dimensional shape

• area

• perimeter

The perimeter of a circle

• diameter

• radius

• circumference

• perimeter

The size of a surface or the amount of space inside a two-dimensional object.

• area

• perimeter

The bottom line of a shape.

• base

• height

• width

• length

The distance from top to bottom. Or at right angles from any base to the furthest corner.

• height

• base

• width

• length

The distance from side to side

• length

• width

• base

• height

The distance from one point on a circle through the center to another point on the circle.

• radius

• circumference

• diameter

The distance from the center to any point on the circle.

• circumference

• diameter

• radius

Characteristics of a parallelogram

• opposite sides are parallel

• opposite sides are equal in length

• all sides are equal in length

• all sides form right angles

Characteristics of a rectangle

• opposite sides are parallel

• opposite sides are equal in length

• all four sides form right angles

• all sides are equal