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14 Cards in this Set
- Front
- Back
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Chord
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Is a segment that joins two points of the circle
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Diameter
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is a chord that contains the center of the circle.
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In a cirlce,
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a radius perpendicular to a chord bisects the chord.
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In a circle, congruent chords are equidistant
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from the center.
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In a circle, congruent chords
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have congruent arcs.
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In a circle, parallel chords
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intercept congruent arcs.
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Central angle
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formed by two intersecting radii such that its vertex is at the center of the circle. It equals the intercepted arc.
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Inscribed angle
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Formed by two intersecting chords. Equals 1/2 of the intercepted arc.
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Tangent
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Touches the circle at exactly one point.
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Intersecting chord rule for segments
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PART X PART = PART X PART
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Secant Secant rule
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Whole x outside = whole x outside
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Secant tangent rule
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Tan^2= whole x outside
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Angle Formed Inside of a Circle by Two Intersecting Chords:
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(Arc + Arc) divided by 2
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Angle Formed Outside of a Circle by the Intersection of:
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(Big arc - Little arc) divided by 2
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