If ` vec a , vec b` are any two vectors, then give the geometrical interpretation of g relation `| vec a+ vec b|=| vec a- vec b|`

Explanation

Let `OA=a` and `AB=b`.
completing the parallelogram `OABC `


Then, `OC=b` and `CB=a ` from `ΔOAB`

we have
`OA+AB=Ob⇒a+b=OB . . . (i) `


From `ΔOCA`, we have
`OC+CA=OA `

`=>b+CA=a`

`=>CA=a−b . . . (ii) `

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