The length of one side of the triangle is 39 cm, which is 12 cm less than the length of the second side

univerkov | May 1, 2021 | education

The length of one side of the triangle is 39 cm, which is 12 cm less than the length of the second side, find the perimeter of the rectangle.

1. Let’s find out what the length of the second side of the rectangle is equal to, if, according to the condition of the problem, the length of its first side is 39 cm, which is 12 cm less than the length of its other side.

39 + 12 = 51 cm.

2. Now that we know the lengths of both sides of the rectangle, we can calculate what its perimeter is.

P = 39 + 39 + 51 + 51 = 39 * 2 + 51 * 2 = 78 + 102 = 180 cm.

Answer: The perimeter of this rectangle is 180 cm.

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