Question 79297
A dog is tethered to the corner of a ten-foot-by-ten-foot square pen by a leash that is 14 feet long. In how much area outside the pen can the dog roam? 
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The  area of that circle is (pi)14^2
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The area of the ten-foot square pen is 100 sq ft.
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The area of the part outside the square = (pi)14^2-100 = 515.75 sq ft.
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Cheers,
Stan H.