Center of a circle - point equidistant from all points on the circle, Central angle - angle whose vertex is the center of the circle and whose sides are radii of the circle, Chord of a circle - line segment that joins two points on the circle, Circle - set of all points equidistant from a given point called the center of the circle, Conjecture - statement believed to be true but not yet proven, Diameter - a line segment whose endpoints are on the circle and passes through the center of the circle, Inscribed angle - angle whose vertex is on the circle and whose sides are chords of the circle, Radian measure - ratio of the length of an arc intercepted by a central angle and the radius of the circle, Radius - line segment drawn from the center of a circle to any point on the circle and is half the length of the diameter of the circle, Secant to a circle - line, ray, or line segment that intersects the circle in exactly two points, Tangent to a circle - line, ray, or line segment perpendicular to the radius and intersecting the circle at exactly one point, the point of tangency,

Geometry Unit 7 Circles

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