The perimeter of a triangle is 17.5 cm, the length of its first side is equal to 0.4 of its perimeter.

| March 20, 2021 | education

The perimeter of a triangle is 17.5 cm, the length of its first side is equal to 0.4 of its perimeter. the length of the second side is 0.8 times the length of the first side. Find the length of the third side of the triangle?

We will solve this task in steps and explain each of them in detail.

1) 17.5 * 0.4 = 7 centimeters – the length of the second side of the triangle, since it is equal to 0.4 of its perimeter, and the perimeter is 17.5 centimeters;

2) 7 * 0.8 = 5.6 centimeters – the length of the second side of the triangle, since it is equal to 0.8 of the length of the first side, and the length of the second side is 7 centimeters;

3) 7 + 5.6 = 12.6 centimeters – the sum of the lengths of the first and second sides of the triangle;

4) 17.5 – 12.6 = 4.9 centimeters – the length of the third side of the triangle.

Answer: 4.9 centimeters.



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