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23 Cards in this Set
- Front
- Back
arc
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a continuous part of a circle. the measure of an arc is the measure of the angle formed by two radii with endpoints of the arc
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central angle
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angle whose vertex is the center of the circle and whose sides are radii of the circle
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chord
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a segment whose endpoints are both on the circle
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circle
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all points in a plane equidistant from a given point (center)
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circumference
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the distance around a circle
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circumscribed polygon
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a polygon containing a circle which touches each side of the polygon in exactly one point.
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concentric
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two or more coplanar circles sharing a center point
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diameter
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a chord that contains the center of a circle
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exterior angle
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an angle whose vertex is outside the cirlce, and whose sides are secants and/or tangents
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inscribed angle
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an angles whose vertex is on the circle and whose sides are secants and/or tangents
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inscribed polygon
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a circle containing a polygon whose vertices are on the edge of the circle
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intercepted arc
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an arc cut off by an angle of the circle, trapped between the sides of the angle
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interior angle
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an angle with its vertex inside a circle, a central angle is also an interior angle
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major arc
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the largest distance between two endpoints of an arc. named by the endpoints of the arc plus a third point.
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minor arc
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the shortest distance between two endpoints of an arc. named by the endpoints.
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point of tangency
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the point at which a tangent intersects a circle of the intersection of two circles. a radius to this point is perpendicular to the tangent.
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radius
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a segment or distance from the center of a circle to a point on the circle
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secant
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a line that intersects a circle at two points, and contains a chord
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semicircle
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an arc whose endpoints are the endpoints of the diameter of the circle
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tangent
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a line in the plane of a circle that intersects the circle in exactly one point
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tangent segment
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segment of the tangent that has the point of tangency as one of its endpoints
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secant segment
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segment of the secant that starts outside the circle and ends on the circle, containing both intersection points
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exterior secant segment
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part of the secant segment that is outside the circle
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