The set of points in a plane that are equidistant from a given point called the center.
A segment whose endpoints are the center and any point on the circle.
A segment whose endpoints are on the circle.
A line that intersects a circle in two points
A line in the plane of a circle that intersects the circle in exactly one point.
standard equation of a circle
(x-h)² + (y-k)² = r²
A chord that contains the center of the circle
An arc of a circle that measures more than zero, but less than 180 degrees.
An arc of a circle that measures greater than 180, but less than 360 degrees.
An angle whose vertex is on the circle and whose sides contain chords of the circle.