Question 553984
circle has a radius of 13 meters which means that the diagonal of a square that is inscribed in the circle will be 26 meters.
this means that a side of the square will be equal to 18.38477631
this means that the crop area to be covered will be 18.38477631^2 = 338 square meters.
the area of the circle itself will be equal to pi*r^2 = pi*13^2 = 530.9291585 square meters.
a picture of what i believe you are asking about is shown below:
<img src = "http://theo.x10hosting.com/2012/jan082.jpg" alt = "$$$$" />
the sides of the square and the diagonal of the square form a right triangle.
in a right triangle, the hypotenuse is equal to the sum of the squares of each leg.
if you let s = the length of each leg, then you get:
s^2 + s^2 = 26^2 which gets you:
2s^2 = 676
divide both sides of this equation by 2 gets you:
s^2 = 338
take the square root of both sides of this equation to get:
s = 18.38477631
you were close but no cigars for you this time unless i misunderstood the problem.