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

I have a triangle ABC formed by vectors a = ( 2, 10, 25 ) and b = ( 5, 4, -2 ) attached at a point P.

And I have to calculate the area of the triangle ABC.

2. Relevant equations

I'm pretty certain that I need to find the area of the parellogram and then half it.

So I need to find the cross product, by calculating the determinant.

3. The attempt at a solution

Calculating the determinant I got

-120 i + 129 j - 42 k

so does this mean i square those and take the square root of them to find the area of the parellogram and then half it...

= 181.121

=> area of triangle = 90.56

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# Homework Help: Area of triangle formed by 2 vectors

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