The distance 'D' of a point (x(adsbygoogle = window.adsbygoogle || []).push({}); _{0},y_{0},z_{0}) from a plane ax + by +cz + d = 0 is given by the formula:

[tex]D = \left|\frac{ax_0 + by_0 + cz_0 + d}{a^2 + b^2 + c^2}\right|[/tex]

Could someone give me some explanation\links on the proof\derivation of this formula? Thanks in advance.

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# Proof for distance formula

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