A) If the perimeter of a square is 80 m

find its side and its area.

The side of the square is 20 meters and area is 400 sq, meters

Step-by-step explanation:

The perimeter of a square with side length a is given by, P = 4a.

Now, given that 4a = 80

⇒ a = 20 meters.

Therefore, the area of the square is, A = a² = 20² = 400 square meters.

Hence, the side of the square is 20 meters and the area is 400 sq, meters. (Answer)