conjectures
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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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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