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