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23 Cards in this Set
- Front
- Back
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Tangent Conjecture
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A tangent to a circle is perpendicular to the radius drawn to the point of tangency.
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Tangent Segments Conjecture
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Tangent segments to a circle from a point outside the circle are congruent.
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Tangent circles
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two circles that are tangent to the same line at the same point
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chord
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a segment whose endpoints are on the circle
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Chord - Central Angle conjecture
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if two chords in a circle are congruent, then they determine two congruent central angles.
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chord - arc conjecture
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if two chords in a circle are congruent, they their intercepted arcs are congruent.
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perpendicular to a chord conjecture
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the perpendicular from the center of a circle to the chord is the perpendicular bisector of the chord.
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chord distance to center conjecture
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two congruent chords in a circle are equidistant from the center of the circle.
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perpendicular bisector of a chord
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the perpendicular bisector of a chord intersects the centerpoint of a circle.
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inscribed angles
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an angle formed by two chords in a circle that share a common endpoint
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inscribed angles conjecture
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the measure of an inscribed angle of a circle is half the measurement of the intercepted arc
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inscribed angles intercepting arcs conjecture
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inscribed angles that intercept the same arc are congruent.
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angles inscribed in a semicircle
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angles inscribed in a semi circle are right angles
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cyclic quadrilateral
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a cyclic quadrilateral is a quadrilateral that is inscribed in a circle
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cyclic quadrilateral conj
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the opposite angles of a cyclic quadrilateral are supplementary
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parallel lines intercepted arcs conjecture
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parallel lines intercept congruent arcs on a circle
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intersecting tangents conjecture
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the measure of the angle formed by two intersecting tangents to a circle is supplementary to the intercepted minor arc
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tangent-chord conjecture
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the measure of an angle formed by the intersection of a tangent and a chord at the point of tangency is half the measurement of the intercepted arc
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intersecting chords
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the measure an angle formed by two intersecting chords is the average of the two intercepted arcs
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intersecting secants conjecture
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the measure of angle formed by two secants that intersect outside a circle is half the difference of the two intercepted arcs
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tangent secant conj
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the measure of an angle formed by an intersecting tangent and secant to a circle is half the difference of the two adjacent intercepted arcs
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secant
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a line that intersects the circle at two points
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arc length
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fraction of circumference
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