5 terms

LandrumLionsTEACHER

a line segment that passes thorugh the center of a circle and has endpoints on the circle.

diameter

The distance around a circle.

circumference

The ratio of the circumference of a circle to the length of it's diameter.

PI

The point inside a circle that is the same distance from all the points on the circle.

center

The set of all points in a plane that are the same distance from a given point.

circle