The area of a square field is 200 ft.² what is the approximate length of each side of the field? round your answer to the nearest foot.

You need to estimate the square root of 200 ft². Rewrite 200 as 2 x 100, then square root of (2*100) is:

10*sq rt(2). The sq rt(2) = 1.414, so the length of each side of the square will be 10*1.414 = 14.14 ft or about 14 ft.

The answer would be the second choice : )