What is this area?

  HAVO | VWO | Practicum |  
  Klas 3 vanaf periode 1 | Studielast: 0 | - klas 1 klas 2 klas 3 klas 4

"I attach my pet snake, Earl, to one corner of my barn with a leash. The barn is square, with sides of length 10, and the leash has a length of twenty, which wraps around the barn. I would like to make sure that I am being humane to Earl, and would therefore like to know that area of my lawn he can traverse while on the leash. What is this area?"


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