Geometry Unit 6 Conjectures

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Tangent Conjecture
a tangent to a circle is perpendicular the radius is drawn to the point of tangency
a tangent to a circle is perpendicular the radius is drawn to the point of tangency
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Tangent Segment Conjecture
Tangent segments to a circle from a point outside the circle are congruent
Tangent segments to a circle from a point outside the circle are congruent
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Chords Arc Conjecture
If 2 chords in a circle are congruent then their intercepted arcs are congruent
If 2 chords in a circle are congruent then their intercepted arcs are congruent
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Chord Central Angles Conjecture
If 2 chords in a circle are congruent, then they determine 2 central angles that are congruent
If 2 chords in a circle are congruent, then they determine 2 central angles that 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
the perpendicular from the center of a circle to a chord is the bisector of the chord
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Perpendicular Bisector of a Chord Conjecture
The perpendicular bisector of a chord passes through the center of a circle
The perpendicular bisector of a chord passes through the center of a circle
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Chord distance to center conjecture
2 congruent chords in a circle are equidistant from the center of the circle
2 congruent chords in a circle are equidistant from the center of the circle
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Inscribed Angle Conjecture
the measure of an angle inscribed in a circle is 1/2 the measure of the intercepted arc
the measure of an angle inscribed in a circle is 1/2 the measure of the intercepted arc
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Inscribed Angles Intercepting Arcs Conjecture
Inscribed angles that intercept the same arc are congruent
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
Angles inscribed in a semicircle are right angles
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Cyclic Quadrilateral Conjecture
The opposite angles of a cyclic quadrilateral are supplementary
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
Parallel lines intercept congruent arcs on a circle
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Circumference Conjecture
If C is the circumference and D is the diameter of a circle, then there is a number π such that C\=dπ. If d\=2r where R is the radius, then C\=2πr
If C is the circumference and D is the diameter of a circle, then there is a number π such that C\=dπ. If d\=2r where R is the radius, then C\=2πr
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Arc Length Conjecture
The length of an arc equals the measure of the arc divided by 360 times the circumference
The length of an arc equals the measure of the arc divided by 360 times the circumference