# What is the distance between # (–2, 1, 3) # and #(–2, 0, 1) #?

##### 1 Answer

Apr 7, 2016

#### Explanation:

By plotting this out in stages and calculating the projected images on the x,y,z planes you end up with a 3 variable equivalent of the Pythagoras theorem

Let the distance between points be

But the negative side of