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