ok so
shortest side=x
shortest sides is 1/3 of longest side
x=1/3 of longest side
3x=longest side
x is 1/2 of second
x=1/2 times second
2x=second side
perimiter=shortest side+second side+longest side
subsitute 2x for second side and 3x for longest side
perimiter=x+2x+3x
perimiter=6x
compare perimiter and longest side
P:longest side
6x:3x
2x:1x
2:1
perimiter is 2 itmes of longest side