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conjectures

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Question
Answer
central angle   an angle that has its vertex at the center of the circle  
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inscribed angle   an angle that has its vertex on the circle and its sides are chords  
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chord central angles conjecture   if two chords in a circle are congruent, then they determine two central angles that are congruent  
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chord arcs conjecture   if two chords in a circle are congruent, then their intercepted arcs are congruent  
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perpendicular to a chord conjecture   the perpendicular from the center of a circle to a chord is the bisector of the chord  
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chord distance to center conjecture   two congruent chords in a circle are equidistant from the center of the circle  
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perpendicular bisector of a chord conjecture   the perpendicular bisector of a chord passes through the center of a circle  
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tangent conjecture   a tangent to a circle is perpendicular to the radius drawn to the point of tangency  
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tangent segments conjecture   tangent segments to a circle from a point outside the circle are congruent  
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inscribed angle conjecture   the measure of an angle inscribed in a circle is half the measure of the intercepted arc (central angle)  
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inscribed angles intercepting arcs conjecture   inscribed angles that intercept the same arc are congruent  
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angles inscribed in a semicircle conjecture   angles inscribed in a semicircle are right angles  
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cyclic quadrilateral conjecture   the opposite angles of a cyclic quadrilateral are supplementary  
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parallel lines intercepted arcs conjecture   parallel lines intercept congruent arcs on a circle  
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c=2(pi)r   what formula do you use to find circumference?  
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c=(pi)d   what formula do you use to find the diameter  
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c=2(pi)r   if you know what the radius is, what formula do you use?  
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c=(pi)r   if you know what the diamter is, what formula do you use?  
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s= angle/360(2(pi)r)   what formula do you use to find the length of an arc?  
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arc length conjecture   the length of an arc equals the circumference times the measure of the central angle divided by 360 degrees  
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Created by: lexie.dautel.16
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