Use Pythagoras' theorem to find the length of the diagonal in the square
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The diagonal of a 101 inch square is about 142.84 inches.
The diagonal of an 18 inch square is about 25.46 inches. (18 times the square root of 2).
A 12" x 12" square has a diagonal measurement of: 16.97 inches.
The diagonal of a square is not perpendicular to its side. The diagonal of a square will separate the square into two triangles. The diagonal goes from one corner to the opposite corner. Because it is a square, the diagonal and a side of the square will always form a 45-degree angle.
a square's sides are equal. so area = (length of side)2 = 33 inches so sqrt(33) = length of side length of side = 5.744....inches = 5.7 inches (to the nearest tenth of an inch)