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