sqrt(15.5(15.5-6)(15.5-11)(15.5-14)) not working?
sqrt(15.5 (15.5-6) (15.5-11) (15.5-14))
31.5267743..., and that's your answer.
Enter it like this:
sqrt((15.5)*(15.5-6)*(15.5-11)*(15.5-14))
Looks like Heron's Formula....the answer is about 31.527 sq units