The diagonal is about 16.97 inches long.
A square with a 30-inch diagonal measurement has sides of 21.21 inches in length.
The diagonal of the garden is 20 meters.
The garden's diagonal is 10 meters.
Each of them is 14.14 inches long. (rounded)
The area is 12.5 m2
A square with a side length of 3 inches has an area of 9 square inches.
"784 inches area" is meaningless. If the area is 784 SQUARE inches, then each side of the square is 28 inches long.
The area of square is : 49.0
26.4 inches for the diagonal.
If a square has an area of 86 square inches, each side is about 9.273 inches long.