Help me find the side lengths:

square: A
Area: 21

To find the side length of the square, we can use the formula for the area of a square, which is given by A = s^2, where A is the area and s is the side length.

Given that the area of the square is 21, we can set up the equation:

21 = s^2

To solve for s, we can take the square root of both sides:

√21 = √(s^2)

√21 = s

Therefore, the side length of the square (s) is approximately equal to √21.