In a circle, the largest square only tells you the side length of the square is 10 cm. How to find the area of the circle?

In a circle, the largest square only tells you the side length of the square is 10 cm. How to find the area of the circle?

In a circle, the largest square only tells you the side length of the square is 10 cm. How to find the area of the circle?
analysis:
Because the area of a square can be the length of the side multiplied by the length of the side, or the diagonal multiplied by half of the diagonal, and the diagonal is 2R
(2r)*(2r)/2=10*10
r^=50
So the circle area: R ^ * 3.14 = 50 * 3.14 = 157 square centimeters