alleryStart learning →The plane at distance p from the origin with unit normal n has equation
Ar · n = p
Br × n = p
Cr · n = p^2
Dr = p n
Answer & Solution
Correct answer: A. r · n = p
The foot of the perpendicular from the origin is ON = pn, and every point P satisfies NP perpendicular to n, giving r · n = p.
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