# math terms

 The flashcards below were created by user Anonymous on FreezingBlue Flashcards. radius half of the diameter center the center of the circle chord a segment whose endpoints are on a circle diameter a chord that passes through the center of a circle secant a line that intersects a circle at two points point of tangency a line that intersects the circle exactly one point tangent segments from a common external point are congruent central angle an angle whose vertex is the center of the circle semicircle arc with endpoints of a diameter arc unbroken part of the circle minor arc part of a circle measuring <180 degrees major acr part of a circle measuring between 180 and 360 degrees measure of a minor arc named with two letters measure of a major arc named with three letters congruent circles two circles are congruent if they have the same radius congruent arcs two arcs are congruent arcs if thhey have the same measure and are acrcs of the same circle or of congruent circles inscribed angle an angle whose vertex is on a circle intercepted arc the arc that lies in the interior of an inscribed angle and has endpoints on the angle inscribed polygon a polygon whose vertices all lie on a circle circumscribed circle a circle that contains the vertices of an inscribed polygon segment of a chord when two chords intersect the interior of a circle , each chord is divided into two segments secant segment a segment that contains a chord of a circle and has exactly one endpoint outside the circle external segment the part of secant segment that's outside the circle circumference the distance around a circle arc length portion of the circumference of a circle sector of a circle the region bounded by two radiis of the circle and their intercepted arc sphere the set of all points in space equidistant from a given point center of a sphere the given point from which all points on the sphere are equidistant radius of a sphere a segment from the center to a point on the sphere chord of a sphere a sphere is a chord that contains the center of the sphere great circle the intersection of the sphere and a plane that contains the center of the sphere hemisphere one of the congruent halfs of a sphere AuthorAnonymous ID74541 Card Setmath terms Descriptionmath terms Updated2011-03-22T21:42:28Z Show Answers