Relier Pairs Parts of a Circle VocabularyVersion en ligne Vocabulary terms par Sherry Tippett 1 Semicircle 2 Chord 3 Minor Arc 4 Major Arc 5 Tangent 6 Diameter 7 Circle 8 Radius 9 Inscribed Angle 10 Arc 11 Secant 12 Point of Tangency 13 Central Angle A part of a circle named by its endpoints. A unique point at which a tangent line meets the circle A segment that contains the center of the circle and whose endpoints are on the circle. The set of all points in a plane that are a given distance, the radius, from a given point, the center. A segment whose endpoints are on the circle. An angle formed by two radii with the vertex at the center of the circle. A line in the plane of the circle that intersects the circle in exactly one point. An arc that is smaller than a semicircle. An angle whose vertex is on the circle and the sides of the angle are chords of the circle. Half a circle. Any segment with one endpoint on the circle and the other endpoint at the center of the circle. A line, ray, or segment that intersects a circle at two points. An arc that is larger than a semicircle.