It is 10 metres.
The garden's diagonal is 10 meters.
The diagonal of the garden is 20 meters.
20m
The diagonal is 10 metres.
The area is 12.5 m2
First, take the square root of 128 to find the side length. Use this with the Pythagorean theorem (a2 + b2 = c2) to find the length of the diagonal, which is the hypotenuse of a triangle that takes up half the area of the whole garden. The diagonal ends up being 16 m. The steps are a bit hard to write on this page, so I've included them in the "related links" section, below.
If the area of the square is 200, then the side is sqrt(200).The length of the diagonal is sqrt(200 + 200) = sqrt(400) = 20 meters.
The diagonal is 14.142 feet.
The diagonal is 33.941 units.
The diagonal is about 16.97 inches long.
Using Pythagoras each side is 26*sq rt of 2 which is 1352 when squared. So area of the square is 1352 square inches
324 units