Chapter 6.3-6.4 Theorems Flashcards

1
Q

Chord ⊥ Bisector ==> Center Th.

A

The ⊥ bisector of a chord contains the center of the ⊙.

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2
Q

≅ Tangent Th.

A

If 2 segments from the same exterior point are tangent to a ⊙, then they are ≅.

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3
Q

Chord Product Th.

A

If 2 chords intersect inside a ⊙, then the product of the lengths of the segments (parts) of 1 chord is = to the product of the lengths of the segments of the other.

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4
Q

Secant Segment Product Th.

A

If 2 secant segments are drawn to a ⊙ from an external point, then the products of the lengths of each secant with its external segment are =.

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5
Q

Secant Tangent Product Th.

A

If a tangent segment and a secant segment are drawn to a ⊙ from an external point, then the square of the lengths of the tangent is = to the product of the lengths of the secant with the length of its external segment.

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6
Q

Central ∠ Inequality Th.

A

In a ⊙ or ≅ ⊙s containing 2 ≠ central ∠s, the larger angle corresponds to the larger intercepted arc.

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7
Q

Conv. Central ∠ Inequality Th.

A

In a ⊙ or ≅ ⊙s containing 2 ≠ arcs, the larger arc corresponds to the larger central ∠.

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8
Q

Chord Center Inequality Th.

A

In a ⊙ or ≅ ⊙s containing 2 ≠ chords, …
• the shorter chord is at the greater distance from the center of the circle.
• the chord nearer the center of the circle has the greater length

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9
Q

Chord Arc Inequality Th.

A

In a ⊙ or ≅ ⊙s containing 2 ≠ chords, the longer chord corresponds to the greater minor arc.

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10
Q

Conv. Chord Arc Inequality Th.

A

In a ⊙ or ≅ ⊙s containing 2 ≠ minor arcs, the greater minor arc corresponds to the longer of the chords related to these arcs.

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11
Q

⊥ Bisector Th.

A

If a point lies on the ⊥ bisector of a segment, then the point is equidistant from the endpoints of the segment.

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12
Q

Conv. ⊥ Bisector Th.

A

If a point is equidistant from the endpoints of a segment, then it lies on the ⊥ bisector of the segment.

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13
Q

∠ Bisector Th.

A

If a point lies on the bisector of an ∠, then the point is equidistant from the sides of the ∠.

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14
Q

Conv. ∠ Bisector Th.

A

If a point is equidistant from the sides of an ∠, then the point lies on the bisector of the angle.

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