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16 Cards in this Set
- Front
- Back
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Central angle
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A central angle of a circle is an angle whose vertex is the center of the circle.
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Chord
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A chord of a circle is a line segment that connects two points of the circle.
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Circle
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A circle is the set of all points in a plane that are given distance from a given point in plane.
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Concentric circles
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Circles are concentric iff they lie in the same plane and have the same center.
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Degree measure of an arc
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The degree measure of an arc is the measure of it's central angle.
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Diameter
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A diameter of a circle is a chord that contains the center. The diameter of a circle is the length of one of these chords.
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Inscribed angle
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An inscribed angle is an angle whose vertex is on a circle, with each of the angle's sides intersecting the circle in another point.
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Major arc
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See page 497
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Minor arc
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See page 497
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Radius
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A radius of a circle is a line segment that connects the center of the circle to any point on it. The radius of a circle is the length of one of these line segments.
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Reflex angle
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A reflex angle is an angle whose measure is above 180 degrees.
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Secant
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A secant is a line that intersects a circle in two points.
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Secant angle
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A secant angle is an angle whose sides are contained in two secants of a circle so that each side intersects the circle in at least one point other than the angle's vertex.
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Semicircle
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See page 497
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Tangent
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A tangent to a circle is a line in the plane of the circle that intersects the circle in exactly one point.
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Tangent segment
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If a line is tangent to a circle, then any segment of the line having the point of tangency as one of its endpoints is a tangent segment to the circle.
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