Let the third side = x.

The sum of any two sides must be greater than the third side

8 + 2 > x
   10 > x

8 + x > 2
    x > -6

2 + x > 8
    x > 6

So 6 < x < 10

So the smallest whole number length the third side could have is 7.
The largest whole number length the third side sould have is 9.

Edwin