Geometry Definitions

Set of points in space that are equidistant from a given point called the center.

A segment who's endpoints are on the circle.

A line that intersects the circle in exactly two points.

Line that intersects the circle in exactly one point.

The point where the tangent line intersects the circle.

Circles that have the same radius.

Circles that have the same center.

Two coplanar circles that intersect at exactly one point.

A line that is tangent to two circles.

Chord containing the center.

Angles who's vertex is the center of the circle.

Arc that is itersepted by a central angle, less then 180.

Arc in the exterior of a central angle, more the 180.

Half a circle.

Angle whose vertex is on a circle and whose sides contain chords of the circle.