# The side of the triangle is 6.3 cm, 20.8 cm less than the second side and 0.9 cm

August 22, 2021 | education

| **The side of the triangle is 6.3 cm, 20.8 cm less than the second side and 0.9 cm more than the third side. Find the perimeter of the triangle**

The first side is 6.3 cm and it is 20.8 cm less than the second.

So if we add 20.8 cm to the first side, we get the second side:

1) 6.3 + 20.8 = 27.1 (cm) the length of the second side of the triangle.

2) 6.3 – 0.9 = 5.4 (cm) the length of the third side of the triangle.

The perimeter of a polygon is the sum of all its sides.

The perimeter of a triangle is calculated using the formula:

P = a + b + c, where P is the perimeter of the triangle, a, b and c are the first, second and third sides.

3) 6.3 + 27.1 + 5.4 = 38.8 (cm) perimeter of the triangle.

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