If a square is inscribed in a circle .. the diagonal of the square will be the diameter of the circle.medea66 wrote:If area of circle = pi r squared, how do you get 8pi?
Area of the square = 16
hence S = 4
Diagonal of a square is sqrt 2* side
thus the diagonal is sqrt 2*4
hence the radius of ths circle is 1/2* (sqrt2*4)
thus Radius = sqrt2*2
Area of the circle is pi*r^2
therefore its pi* (2rt2)^2
= 8pi
hope it helps..
