A square has 2 diagonals that are equal in length and bisect each other at right angles.
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The square of the diagonal is (652+692)=8986 The diagonal is then the square root of 8986=94.79...
The diagonal measurement of an 8 ft square is: 11.31 feet.
The diagonal of a square 2.0 meters on a side is: 2.828 meters.
Since a square has right angles, you can use the Pythagorean Theorem to calculate the diagonal. Specifically, the diagonal of a square is equal to the length of a side, multiplied by the square root of 2.
Divide the length of the diagonal of a square by 1.4142 (which is the square root of 2) to find the length of a side. Similarly, to find the length of the diagonal of a square, multiply the length of a side by 1.4142.