If area of a square is 81 square unit how long area the sides?

The area of a square is calculated by squaring the length of one of its sides.

So, if the area of the square is 81 square units, then the length of one of its sides would be the square root of 81, which is 9 units.

Therefore, the sides of the square would be 9 units long.

Since the area of a square is calculated by squaring its side length, we can find the side length by taking the square root of the area.

Given area of the square = 81 square units

Let's assume the side length of the square is "x" units.

Area of a square = x^2

Substituting the given area into the formula, we get:

81 = x^2

Taking the square root on both sides:

x = √81

x = 9 units

Therefore, the length of each side of the square is 9 units.