How can you find the area of a triangle with only 3 coordinate points?

Answer 1

1. Connect the dots
2. Find the length of each of the sides
3. Use Heron's Formula to find the area of the triangle by knowing the lengths of the sides.

Heron's formula is Area = sqrt{ (s)(s-a)(s-b)(s-c) }

Where s = the semi-perimeter = (a+b+c)/2

a.b.c are the lengths of the sides

Hope that helps!