What is the area of a triangle whose sides measure 15 inches, 18 inches, and 21 inches?
Give your answer in simplified radical form.
FIrst is it a right triangle ? 15^2 + 18^2 = 21^2 No it is not
Try using Heron's Formula
Where p is half the perimeter = a+b+c/2
This is the formula for finding the area of a triangle with 3 different sides (called Heron's Formula), but unfortunately, I can't help you when it comes to simplified radical form as I do not know how to calculate that.