Sort:  

First think of it as a vector with a particular basis. My vector is (6,3,2) which has length sqrt(36+9+4) = sqrt(49) = 7. Therefore the distance is 7.

Correct and perfect explained :)

Thanks :)

Damn...am not really good at maths
Nice post my frnd👍

like it ..math is my favorite subject!!

Any guesses on the solution :)