- #1
SMA_01
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Homework Statement
The problem states to find an equation of the plane consisting of all points that are equidistant from (-1,3,-1) and (-2,-3,03) and having -1 as the coefficient of x.
The Attempt at a Solution
I actually got the solution by finding a vector using the two points and finding a new point on the plane by computing the midpoint of the 2 given points, and then plugged them into the plane equation. The thing is I don't understand how that worked out. I know that for the plane equation, you need a vector perpendicular to the plane, the normal vector right? So how come for this problem, it was sufficient to just compute a vector using the two given points which lie on the plane? Isn't this vector on the plane and not perpendicular to it?
Maybe I'm missing the obvious, an explanation would be appreciated.
Thanks