(Second Question in photo)

BTW the question is:
Using the diagram at the right, which of the following represents the ratio of
the circle's circumference to the square's perimeter?

Reminder (because this isn't geometry yet): C = 21 * (radius)



(a) r/pi
(b) 4/r
(c) 4/pi
(d) pi/4
(e) r/4

Second Question in photo BTW the question is Using the diagram at the right which of the following represents the ratio of the circles circumference to the squ class=