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August 21, 2014

August 21, 2014

Posted by **please help me out!!! please** on Monday, February 11, 2013 at 10:53am.

- geometry -
**Reiny**, Monday, February 11, 2013 at 11:27amIn this case the secant - tangent theorem says

PA^2 = PD x PC , where D in on the extension of PO as it hits the circle , making CD a diameter

Let the diameter be 2x , (radius = x)

(14)(2x+14) = 42^2

28x + 196 = 1764

28x = 1568

x = 56

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