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The length of the perpendicular from the...

The length of the perpendicular from the origin to the plane passing though three non-collinear points `veca,vecb,vecc` is

A

`([[vecavecbvecc]])/([vecaxxvecb+ vecbxx vecc+ vecc xx veca])`

B

`(2[[vecavecbvecc]])/([vecaxxvecb+ vecbxx vecc+ vecc xx veca])`

C

`[vecavecbvecc]`

D

None of these

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The correct Answer is:
A
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