Finding the Radius of Circle

You are standing at a length of ID from the edge of a swimming pool. The distance from you to the diving board is CD.

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Calculate the radius, volume, and the area of the pool cover. (Note the depth of the pool is 9 feet.)

Repeat this process 5 times by manipulating point D and only point D, using the sliders.

Michael Seiler, Created with GeoGebra