# One side of the triangle is 20 m, the second is 4 times larger than the first and the third side is 12 m

August 29, 2021 | education

| **One side of the triangle is 20 m, the second is 4 times larger than the first and the third side is 12 m less than the second, which is equal to the perimeter of the triangle.**

1) Find out the size of the second side of the triangle: 20 4 = 80 (m);

2) Let’s calculate the value of the third side of the triangle: 80 – 12 = 68 (m);

3) Using the formula, we calculate the perimeter of the triangle: P = a + b + c = 20 + 80 + 68 = 168 (m).

Answer: The perimeter of the triangle is 168 meters.

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