How to find the area of triangle whose vertices are (3,-1),(2,7) and (-5,6) ?

2 Answers
May 26, 2018

The best way is called the Shoelace Formula:

A = 1/2 | 3(7) - (-1)(2) + 2(6) - 7(-5) + (-5)(-1) - 6(3) | = 57/2

I have solved this way. Please, see the answer below:
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