Answer:
51
Step-by-step explanation:
6 * 7 = 42
the side of the triangle can be found by subtracting 7 for 13, which is 6
so
6 * 3 = 18
since it's a triangle and the fomula is 1/2BH we're going to divide 18/2 to get 9
42 + 9 = 51
I took the test and this was the correct answer :^D
