If the area of the square is 20 m² then the side length of the square is √20 m. Then the correct option is B.
What is a square?
It is a polygon that has four sides. The sum of the internal angle is 360 degrees. In a square, opposite sides are parallel and all sides are equal and each angle is 90 degrees. And its diagonals are also equal and intersect at the mid-point.
The area of a square is 20 m².
Then the area of the square s given as
Area = a²
where a is the side length of the square.
a² = 20
a = √20 m
The side length of the square is √20 m.
More about the square link is given below.
https://brainly.com/question/13747846
