1.

If bara,barb,barc are the position vectors of the vertices of a triangle ABC, then the area of triangle ABC is

Answer»

`ABS(BARABARBBARC)`
`1/2[barabarbbarc]`
`abs(baraxxbarb+barbxxbarc+barcxxbara)`
`1/2abs(baraxxbarb+barbxxbarc+barcxxbara)`

ANSWER :D


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