The area of the rectangle is 36cm2. Find the perimeter of the rectangle if its length is 9cm.

1 In order to calculate what the unknown side of the rectangle is equal to, we need to divide its area by the length of the known side.

So, we find out what the width of a given rectangle is equal to if its area is 36 cm ^ 2, and its length is 9 cm.

36/9 = 4 cm.

2. Now that we know that one of the sides of the rectangle is 9 cm, and the other side is 4 cm, we calculate its perimeter. To do this, add the lengths of all its sides.

P = 9 + 9+ 4 + 4 = 26 cm.

Answer: The perimeter of the given rectangle is 26 cm.