>>11669276Problem 13.1 A circle
Problem 13.2 16 is the perimeter of the human's walk, and 15 its area, though walking probably only applies to perimter, while the goat's area is pi, and it's perimeter 2*pi. Therefore if the perimeter and only the perimeter is counted then the goat will have already gone through the whole "field" twice in fact and would be more or less half the circle.
Problem 13.3 by being pulled by two ropes from two separate stakes so as two form a circle-circle intersection
Problem 13.4 A two dimensional capsule or well a square connected to two semi-circles
Problem 13.5 This is one is more difficult than the rest. I'll have to ponder about this one and the next...
