One side of the triangle is 6 cm long, the second is 4 times longer than the first

One side of the triangle is 6 cm long, the second is 4 times longer than the first, and the third is 3 cm shorter than the second. Calculate the perimeters of the triangle.

1) Calculate the value of the second side of the triangle: 6 4 = 24 (cm);
2) Let’s find what the third side of the triangle is equal to: 24 – 3 = 21 (cm);
3) Calculate the perimeter of the triangle using the formula: P = a + b + c = 6 + 24 + 21 = 51 (cm);
Answer: the perimeter of the triangle is 51 cm.