Question 881973
If you put the sides flat on a table 
on top of each other
you have {{{ 15 - 7 = 8 }}}
That is a straight line, not a triangle,
The next larger whole number for the 3rd side
that makes it a triangle is {{{ 9 }}}
The triangle is 15 - 7 - 9 for the
smallest 3rd side