Question

What is the distance between `(9, 2, 0)` and `(8, 6, 2)`?

Answer 1

`sqrt21`

Explanation:

The distance formula for 3 dimensions is:

`sqrt((Deltax)^2 + (Deltay)^2 + (Deltaz)^2)`

In this case,

`Deltax = 8 - 9 = -1`
`Deltay = 6 - 2 = 4`
`Deltaz = 2 - 0 = 2`

So the distance is:

`sqrt((-1)^2 + 4^2 + 2^2) = sqrt(1+16+4) = sqrt21`