The perimeter of the rectangle is 80cm. Find the sides of the rectangle if one side is 4cm larger than the other.

1) Let’s find out how long the first side of the rectangle has, if it is known that the second is 4 cm longer, and its perimeter is 80 cm.We compose an equation where:

X – width;

X + 4 – length;

80 – perimeter.

(X + X + 4) * 2 = 80;

2X + 2X + 8 = 80;

4X = 80 – 8;

4X = 72;

X = 72/4;

X = 18 cm.

2) We find out the length of the second side of the rectangle if it is known that it is 4 cm longer than its first side, and we found out the length of the first side and it was 18 cm.

18 + 4 = 22 cm.

Answer: the sides of the rectangle are 18 cm and 22 cm.

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