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.
How to solve this problem solving question?
-3
$\begingroup$
problem-solving
1 Answers
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.
