Geometry HS Mathematics Unit: 07 Lesson: 01 Circle Vocabulary Recording Sheet KEY Vocabulary Word Definition Picture A segment whose Chord endpoints lie on a circle A chord that Diameter contains the center of a circle A line that Secant of a Circle contains a chord A line that lies in the plane of a circle and that Tangent to a Circle intersects the circle at exactly one point (point of tangency) The set of all points in a plane at a given distance Circle from a given point in the plane A segment from a point on Radius a circle or a sphere to the center Circles with the Congruent Circles same radius Circles that lie in the same Concentric Circles plane that share the same center ©2012, TESCCC 04/15/13 page 1 of 2 Geometry HS Mathematics Unit: 07 Lesson: 01 Circle Vocabulary Recording Sheet KEY Vocabulary Word Definition Picture Angle whose vertex lies on a circle and whose Inscribed Angle sides contain chords of the circle Angle whose vertex is the center of a circle Central Angle and whose sides contain radii of the circle Distance around a circle, Circumference that is, the perimeter of a circle A fractional distance of the circumference of a circle Arc Length defined by the arc Two points on a circle and the continuous part of the Arc of a Circle circle between the two points An arc of a circle whose Semicircle endpoints are the endpoints of a diameter An arc of a circle whose length is less than the Minor Arc length of a semicircle of the circle An arc of a circle whose length is greater than the Major Arc length of a semicircle of the circle ©2012, TESCCC 04/15/13 page 2 of 2 .