Area of outside region

Geometry Level pending

A line segment is 50 units long and intersects a circle tangentially at one of it's endpoints. The line is then revolved around the circle remaining tangent, and keeping it's endpoint on the circle as it is revolved, creating a loop that completely encloses the inner circle, as shown in the diagram below. Find the area of the outside region created by the revolution. Use 3.14 for pi if necessary.

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