# Screenshot_1292.png Marked for Review 43 The length of the perpendicular from the origin to the plane passing through the point and containing the line

@Santhosh

$\\first\:find\:the\:equation\:of\:plane\\(\overrightarrow{r}-\overrightarrow{a})\cdot\overrightarrow{n}=0\\and\:\:\overrightarrow{n}\:is\:perpendicular\:to\:(\overrightarrow{b}-\overrightarrow{a})\:\:and\:\:\overrightarrow{c}\\we\:can\:write\\\overrightarrow{n}=(\overrightarrow{b}-\overrightarrow{a})\times\overrightarrow{c}\\eq\:of\:plane\:become\\(\overrightarrow{r}-\overrightarrow{a})\cdot((\overrightarrow{b}-\overrightarrow{a})\times\overrightarrow{c})=0\\now\:apply\:the\:concept\:of\:\:distance\:of\:a\:point\:from\:a\:plane\\$

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