so a squared plus b squared equals c squared.
well heres the obvious cheating answer...a=0 b=10 c=10
and if b=c (or a=c) then b squared= c squared. so then if b=c in this equation a squared plus b squared=c squared we can take out "b squared= c squared" because they are equal. so we are left with a squared=0. so a=0 is the only way i can think of