We see that since this is at the corner of the barn, the snake is free to travel in a three quarter arc around this point such that it does not intersect the barn. On the corners, we notice that the leash will bend, and basically act as a shorter leash xed at the other two corners. Thus, there is a leash of length 10 for each of two quarter circles, which sum to half of an arc:

  • $A$=$\frac{3}{4}\pi 20^2+\frac{1}{2}\pi 10^2$=$350\pi$


©2004-2024 Wiskundeleraar - login