Question

What is the distance between `(-7,-3,6)` and `(-3,5,1)`?

Answer 1

By using Pythagoras:

Explanation:

Distance on the `x-y` plane is `sqrt((x_2-x_1)^2+(y_2-y_1)^2)`

Then the distance including the `z` plane is
`sqrt((z_2-z_1)^2 +(x_2-x_1)^2+(y_2-y_1)^2)`

Just use substitution to solve.