If center of a regular hexagon is at the...

If center of a regular hexagon is at the origin and one of the vertices on the Argand diagram is `1+2i` , then its perimeter is `2sqrt(5)` b. `6sqrt(2)` c. `4sqrt(5)` d. `6sqrt(5)`

`6sqrt5`

`4sqrt5`

`6sqrt2`

`2sqrt5`

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