Question 822759
Check each one.
1) 4,9,13 
   4^2+9^2 =? 13^2
   16 + 81 not = 169 so this one does not work
2) 5,8,12
   5^2 + 8^2 =? 12^2
   25 + 64 not = 144 so this one does not work
3) 5,5,13
   5^2 + 5^2 =? 13^2
   25 + 25 not = 169 so this does not work
4) 5,5,10
   5^2 + 5^2 =? 10^2
   25 + 25 not = 100 so this does not work