May I ask you for help?
What I have is :
The triangle has sides 16, 21, and 20 ft.
How many square feet in the triangle? Round to nearest square foot.
I ried to use Arbitrary triangle calculator here:
Arbitrary triangle calculator
Seems like it is the right answer, because textbook shows me 151ft.
But I want to understand the way of solving it.
Please show me step by step solution and the formula.
Thanks in advance!