14.7 - Copy

# 14.7 - Copy - 14-7 The Power Theorems A Definition a...

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14-7 The Power Theorems A) Definition a. Tangent segment i. If is tangent to a circle at A, then is called a tangent segment from Q to the circle B) Theorem 14-20 (The Two-Tangent Theorem) a. The two tangent segments to a circle from a point of the exterior are congruent and determine congruent angles with the segment from the exterior point to the center b. If then c. Example) i. A point M is 5 cm from the center of a circle with a 6 cm diameter. How long are the tangent segments from the point M?

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C) Definition a. Secant segment i. If a segment intersects a circle in two points, and exactly one of these is an endpoint of the segment, then the segment is called a secant segment to the circle D) Theorem 14-21 (The Two-Secant Power Theorem)

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