6.88 square yards. (just divide square feet by nine to get square yards).
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62
The perimeter is the sum of all four sides; in a square, all four sides have the same length. Therefore, you simply need to divide the perimeter by 4.
a2 + 62 = 122 a2 + 62 - 62 = 122 - 62 a2 = 144 - 36 a2 = 108 taking the square root of each side, we get a equal plus or minus the square root of 108, or plus or minus 6 times the square root of 3.
62
Area = pi*62 = 113.097 square cm to 3 dp