# The perimeter of the rectangle is 36 cm and one side is 10 cm. Find the other side.

March 25, 2021 | education

| In order to solve the problem, remember what the perimeter of a rectangle is – it is the sum of the lengths of all its sides. For clarity, let’s write down the formula:

P = a + a + b + b = 2a + 2b, where P is the perimeter, a, b are the sides of the rectangle.

Since we know that the perimeter of the rectangle is 36 cm, and one of its sides is 10 cm, therefore, we can substitute the data we have in the formula and calculate the length of the second side.

36 = 2 * 10 + 2v;

2c = 36 – 20;

2c = 16;

h = 16/2;

h = 8 cm.

Answer: The length of the second side of the rectangle is 8 cm.

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