The area of a rectangle whose side is 4 cm is 36 cm2, find its perimeter.

Let’s solve this task in steps and explain each of them in detail.
1) 36: 4 = 9 centimeters – the second side of the rectangle, since its area of the rectangle is 36 cm ^ 2, and the first side is 4 centimeters;
2) 2 * (4 + 9) = 2 * 13 = 26 centimeters – the area of a rectangle with side lengths of 4 centimeters and 9 centimeters.
Answer: 26 centimeters.