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Unit 3- C&S

Unit 3, Circles and Spheres, Accelerated Math 1

Center A given point from which a circle is drawn
Circle The set of all points equidistant from a specific point
Radius (1/2 the diameter) a segment whose endpoints are the center and any point on the circle
Chord A segment whose endpoints are in a circle
Diameter (2x the radius) A chord that contains the center of a circle
Secant a line that intersects a circle in 2 points
Tangent a line, ray, or segment that intersects a circle in exactly 1 point, called the point of tangency
Central angle an angle whose vertex is the center of a circle
Arc an unbroken part of a circle
Semicircle an arc whose endpoints are the endpoints of the diameter.
Minor angle an arc made by a central angle -180 degrees
Major angle an arc made by a central angle 180+ degrees
Congruent Circles Circles with congruent radii
Congruent arcs 2 arcs that have the same measure and are arcs of the same circle or of congruent circles.
Inscribed angle an angle whose vertex is on a circle and whose sides contains chords of the circle
Intercepted arc an arc that lies in the interior of an inscribed angle and has endpoints on the angle.
Inscribed polygon a polygon in which all vertices lie on an angle
Circumscribed circle a circle that contains an inscribed polygon
Created by: Hannahbelle