Question

how do you find the area of a triangle

Answer 1

The easiest way is (1/2) base * height. You can also use Heron's formula: If a, b, and c are the side lengths, and \(s=\frac{a+b+c}{2}\), then area=\(\sqrt{s(s-a)(s-b)(s-c)}\). If you know the sin of an angle and the lenghth of two sides next to it, you can use \(\tfrac{1}{2}ab\sin c\). There are a few others (using the inradius), but these three are the easiest.

Answer 2

find eqns of the line in vector form and then there's a cross product formulla ! ;)

Answer 3

the formula for the area of a triangle is:====
A=1/2*base*height