One side of the rectangle is 40 cm, and its perimeter is 201 cm. Find the area of the rectangle.

1) Determine the length of the second side of the rectangle given to us, if we know that its perimeter was 201 cm, and one side of it has a length of 40 cm.We draw up an equation where:

X is the second side.

2 * (X + 40) = 201;

2X + 80 = 201;

2X = 201 – 80;

2X = 121;

X = 121/2;

X = 60.5 cm.

2) Find the area of a given rectangle if we know that its sides are 40 cm and 60.5 cm.

60.5 * 40 = 2420 cm².

Answer: the area of this rectangle was 2420 cm².