Question

the sides of a triangle are in the ration 5:12:13 what is the length of each side of the triangle if the perimeter of the triangle is 15 inch

Answer 1

solve for x here:

Answer 2

The reason this works is because it's a ratio, like the problem says. Each side will be related to the ratio - in a triangle who's sides are the ratio, the perimeter would be 30 (5 + 12 + 13). however, we know the perimeter, which means that the sides will not be 5, 12, or 13, but rather numbers that are smaller, yet numbers that still conform to that ratio. Once you find x, you're almost there - take the value you get, divide it by 5 to find out the first side, then take the x-value and divide it by 12 to get the second side, then take the x-value and divide it by 13 to get the third side. I hope that makes sense.