Area of Triangle – Heron’s Formula
(Fayetteville, NC, USA)
Heron’s Formula, Three-Point Coordinate Formula
• Plot each of the following points, and connect them to form the triangle ABC.
A(-2,5); B(1, 3); C(-1,0)
• Find the area of the triangle using two techniques:
The three-point coordinate formula (see Math Open Reference, 2009).
Show your work in detail. Prove that both methods yield the same results.
I plotted the points on the x,y axis but I am lost when it comes to the Heron formula or the three point coordinate formula. For side a, I got √13 for side b, I got √26 and for side c is got 3. This is getting me nowhere. I really need help