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May 23, 2015

Homework Help: Geometry

Posted by Chica on Thursday, May 19, 2011 at 11:09pm.

A plane intersects a sphere that has a radius of 13cm. The distance from the center of the sphere to the closest point on the plane is 5 cm. What is the radius of the circle that is the intersection of the sphere and the plane?

A. 8cm
B. 10cm
C. 12cm
D. 13cm

Could please shed some light on how this problem is worked out.

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