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Explore various segment relationships and equations involving chords, secants, and tangents in circles. Use the Chord-Chord Product Theorem, Secant-Secant Product Theorem, and Secant-Tangent Product Theorem to solve for unknown values and segment lengths.
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Warm Up(Add to Hw) Solve for x. 1. 2. 3x = 122 3. BC and DC are tangent to A. Find BC. 4 48 14
11-6 Segment Relationships in Circles Holt Geometry
J Example 1: Applying the Chord-Chord Product Theorem Find the value of x and the length of each chord. 10(7) = 14(x) 70 = 14x 5 = x EF = 10 + 7 = 17 GH = 14 + 5 = 19
A secant segmentis a segment of a secant with at least one endpoint on the circle. An external secant segmentis a secant segment that lies in the exterior of the circle with one endpoint on the circle.
Example 3: Applying the Secant-Secant Product Theorem Find the value of x and the length of each secant segment. 112 = 64 + 8x 48 = 8x 6 = x ED = 7 + 9 = 16 EG = 8 + 6 = 14
A tangent segmentis a segment of a tangent with one endpoint on the circle. ABand ACare tangent segments.
Example 4: Applying the Secant-Tangent Product Theorem Find the value of x. ML JL = KL2 20(5) = x2 100 = x2 ±10 = x The value of x must be 10 since it represents a length.
Lesson Quiz: Part I 1. Find the value of d and the length of each chord. d = 9 ZV = 17 WY = 18 2. Find the diameter of the plate.
Lesson Quiz: Part II 3. Find the value of x and the length of each secant segment. x = 10 QP = 8 QR = 12 4. Find the value of a. 8