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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