Question 266497
let the length of the sides be a,a and b

given 
perimeter a+b+a=22 => 2a+b=22

and b=a-2 substituting this in the above eq.

we get 2a+a-2=22

=>  3a=24

=> a=8

so length of the shortest side = b= 8-2 = 6

length of the shortest side = 6 feet