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### 14 Cards in this Set

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 chord central angles conjecture in a circle if the two chords are congruent the central angles are congruent. Chord arcs conjecture if two chords in a circle are congruent, then their intercepted arcs are congruent. Perpendicular to a chord conjecture The perpendicular from the center of a circle to a chord bisects the chord. Chord distance to a center conjecture Two congruent chords in a circle are equidistant from the center of the circle. Perpendicular bisector of a chord converse The perpendicular bisector of a chord passes through the center of the circle. Tangent Conjecture a radius is perpendicular to a tangent at the point of tangency Tangent segments conjecture tangent segments from a point outside a circle are congruent. Inscribed angle conjecture - the measure of a angle inscribed in a circle is half the measure of its arc. Inscribed angles intercepting arcs conjecture Inscribed angles that intercept the same arc are congruent Angles inscribed in a semicircle conjecture The angles inscribed in a semicircle are right angles. Cyclic quadrilateral conjecture The opposite angles of a cyclic quadrilateral are supplementary Parallel lines intercepted arcs conjecture parallel lines intercept congruent arcs on a circle. Circumference conjecture to find the circumference of a circle, you multiply 2 by pi and then by the radius Arc Length Conjecture the length of an arc equals the arch angle divided by 360 times the circumference