Question

How to find the area of a triangle given the coordinates of the vertices?

Answer 1

you can use the distance formula (y2-y1)/(x2-x1) to find the length of the sides.

Answer 2

You can find the length of each side first using the formula:
d = \[\Large d = \sqrt{(x _{2} - x _{1})^2 + (y _{2}- y _{1})^2}\]

Answer 3

OOPS yeah. I totally messed the formula up! SO SORRY!

Answer 4

Then find the semi-perimeter of the triangle: S = (a + b + c) / 2

Area A = sqrt{ S * (S - a) * (S - b) * (S - c) }