(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A = (7,6,8)

B = (2,3,-1)

C = (2, -7, 9)

Find the area of the triangle these 3 points make

I'm getting slightly different results for different combinations I use

if I take

CA = a - c = (5 , 13 , -1)

CB = b - c = (0, 10, -10)

Taking another combination

AB = b - a = (-5, -3, -9)

AC = c - a = (-5, -13, 1)

Taking the modulus of the cross product and halving yields similar, but different answers. I've check and redone my work

Why?

Thanks

Thomas

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# Area of a triangle by vectors - getting different answers

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