Central Angle
Secant
Inscribed Angle
Arc
Semicircle
Circle
Chord
Tangent
Major Arc
Point of Tangency
Minor Arc
Diameter
Radius
An arc that is smaller than a semicircle.
Half a circle.
A line in the plane of the circle that intersects the circle in exactly one point.
A unique point at which a tangent line meets the circle
A line, ray, or segment that intersects a circle at two points.
Any segment with one endpoint on the circle and the other endpoint at the center of the circle.
An arc that is larger than a semicircle.
An angle whose vertex is on the circle and the sides of the angle are chords of the circle.
A segment that contains the center of the circle and whose endpoints are on the circle.
An angle formed by two radii with the vertex at the center of the circle.
A segment whose endpoints are on the circle.
A part of a circle named by its endpoints.
The set of all points in a plane that are a given distance, the radius, from a given point, the center.