I,m not sure but I tried my best I think it's c
Step-by-step explanation:
3 525&::;;;;;;;;;;;;"""""""""
I think the answer is 15 cuz if the height is 3; 3 on each side is 6 so 6-16=10 and 10 divided by 2 for the two others sides is 5… and 5x3=15
Solve for one side using base times height divided by two the answer will be the same for both sides so add them
