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Half of the chord, the distance of the midpoint from the center, and a radius, form a right triangle, with the radius as its hypotenuse. (4.5)2 + (6)2 = (radius)2 (20.25) + (36) = 56.25 = R2 Radius = 7.5 inches

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Q: A chord of a circle is 9 inches long and its midpoint is 6inches from the center of the circle What is the radius of the circle?
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