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