The perimeter of the rectangle is 40 m, one of its sides is 4 m. What is the area of the rectangle.

Let’s find the value of the length of this rectangle, for this we need to divide the value of the perimeter of this rectangle by two, and subtract the value of the width of this rectangle from the result:

40: 2 – 4 = 16 m is the length of this rectangle;

Let’s find the value of the area of this rectangle, for this we need to multiply the value of the length of this rectangle by the value of the width of this rectangle:

4 * 16 = 64 m2 is the area value of this rectangle.

Answer: 64 m2 is the value of the area of this rectangle.