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