Answer:
12 inches 20 inches 36 inches
Explanation:
ratio of 3:5:9
Multiply each side by x
3x: 5x: 9x
Add the sides together to find the perimeter of 68
3x+5x+9x = 68
Combine like terms
17x = 68
Divide by 17
17x/17 = 68/17
x = 4
The sides lengths are
3*4: 5*4: 9*4
12 : 20: 36