-3

I probably look like a complete idiot asking this question, but how do you solve these two questions about calculating the perimeter of these circles.

enter image description here

Jean Marie
  • 81,803
Remington Lamington
  • 1

1 Answers1

2

Hint (for Pac-Man): circumference is $80 \,\pi\,$, then deduct $\frac{40^\circ}{360^\circ}=\frac{1}{9}$ of it, then add twice the radius.

dxiv
  • 76,497