The distance around the circle.

A continuous part of a circle between two points on the circle.

An angle whose vertex is the center and whose sides are the radii of the circle.

A line segment whose endpoints are on a circle.

An angle whose vertex is on the circle and whose sides are chords of the circle.

Is the intersection of the tangent line and a point on the side of the circle.

The given point from which all points on a circle are equidistant.

A line that intersects a circle in exactly two points.

Circles who's radii are congruent.

Circles that lie in the same plane and have the same center.

An arc that is larger than the semicircle.

A region of a circle bounded by an arc of the circle and two radii to the arc's endpoints.

Arcs on the same circle that have exactly one point in common.

An arc that is smaller than a semicircle.

A line that intersects a circle in exactly one point.

A line segment that has one endpoint on a circle and the other endpoint at the center of the circle.