Let(adsbygoogle = window.adsbygoogle || []).push({}); randaeach be a position vector of a point on a plane. Letnbe the normal to the plane.

The normal equation of the plane would be:

n.(r-a) = 0

r.n=a.n

My question is, the equation doesn't really 'describe' a plane...so what's the purpose?

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# What is the purpose of the normal equation of the plane?

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