1.  the part of a secant segment that is outside a circle 
 
2.  a segment that contains a chord of a circle and has exactly one endpoint outside a circle 
 
3.  an angle whose vertex is on a circle and whose sides contain chords of a circle 
 
4.  an arc of a circle whose points are on or in the interior of a central angle 
 
5.  an arc with endpoints that are the endpoints of the diameter 
 
6.  center of a circle is (h, k) and radius is r so(xh)2+(yk)2=r2 
 S  T  A  N  D  A  R  D  E  Q  U  A  T  I  O  N  O  F  A  C  I  R  C  L  E                          

7.  a polygon where all of its vertices lie on a circle 
 
8.  a segment whose endpoints are on a circle 
 
9.  the difference between 360° and the measure of the related minor arc 
 
10.  the point inside a circle that is the same distance from every point on a circle 
 
11.  an angle whose vertex is the center of a circle 
 
12.  a line in the plane of a circle that intersects a circle in exactly one point 
 
13.  a segment whose endpoints are the center and any point on a circle 
 
14.  the two segments that chords are divided into when two chords intersect in the interior of a circle 
 
15.  two arcs that have the same measure and are of the same circle or of congruent circles 
 
16.  a chord that contains the center of a circle 
 
17.  every vertex of a polygon lies on a circle 
 
18.  the measure of a circle's central angle 
 
19.  the set of all points in a plane that are equidistant from a given point 
 
20.  an arc of a circle whose points are on or in the exterior of a central angle 
 
21.  an arc that consists of endpoints that lie on the sides of an inscribed angle and all the points of a circle between the endpoints 
 
22.  two circles that have the same radius 
 
23.  a line that intersects a circle in two points 
 