Question

The lengths of the sides of a triangle are in the ratio

4:3:5. Find the lengths of the sides if the perimeter is
18 inches.

Answer 1

HOW TO SOLVE:

1) use x as a variable
2) the starting equation is:
4x + 3x + 5x = 18

3) add all the like terms on the left side of the equation:
12x = 18

4) Divide by 12 on both sides:
x=1.5

5) Find the lengths of the sides:

- 4x = 4(1.5) = 6

- 3x = 3(1.5) = 4.5

- 5x = 5(1.5) = 7.5

SO, the lengths of the sides of this triangle are: 6, 4.5, and 7.5