Two perpendicular diamters(cutting each other at right angles) of a circle cut the circumference at four(4) points. A square is formed by joining the 4 points. If the circumference of the circle is 132cm, find the area of the square.

Question

so right here they tell me first to find the radius of the circle...2 times pi times r?

2pi r=132
r=66/pi or diameter=132/pi

The area of a rhombus (a square is a rhombus) is the product of its diagonals
so the area = (132/pi)(132/pi) =