Circle Conundrum

Geometry Level 1

If the area of the circle can be expressed as $$A \pi \text{ cm}^2$$, find the value of $$A$$.

A rectangle is drawn in a circle so that one vertex lies on the center point of the circle, and the opposite corner lies on the circumference. The height of the rectangle is $$8\text{ cm}$$, and its diagonal is $$10\text{ cm}$$.

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