Circle

A circle is the locus of all points equidistant from a central point.

Definitions Related to Circles

arc: a curved line that is part of the circumference of a circle

chord: a line segment within a circle that touches 2 points on the circle

circumference: the distance around the circle

diameter: the longest distance from one end of a circle to the other

radius: distance from center of circle to any point on it

sector: is like a slice of pie (a circle wedge)

tangent of circle: a line perpendicular to the radius that touches ONLY one point on the circle

origin: the center of the circle