Question 309590
21=A+B+C
21=8+B+C
21-8=B+C
13=B+C
IF THE SHORT SIDE WAS 1 THE OTHER SIDE WOULD HAVE TO BE 12. WHICH WOULD NOT A TRIANGLE MAKE. (8+1<12)
IF THE SHORT SIDE WAS 2 THE OTHER SIDE WOULD HAVE TO BE 11. AGAIN NOT A TRIANGLE. (8+2<11)
IF THE SHORT SIDE WAS 3 THE OTHER SIDE WOULD HAVE TO BE 10. THESE SIDES WOULD MAKE A TRIANGLE. (8+3>10)
ANSWER IS 3 FOR THE SHORTEST SIDE OF THE TRIANGLE.