http://www.isquaredonline.com/chips/1.jpg [Broken]

the above link is the answer to the problem i'm solving. i was wondering how i'd come up with the equation of the plane "x-y+z=0" when only the vertices of the plane are provided in the problem. thanks in advance.

the above link is the answer to the problem i'm solving. i was wondering how i'd come up with the equation of the plane "x-y+z=0" when only the vertices of the plane are provided in the problem. thanks in advance.

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