Question

what are the coordinates of point R ?

Answer 1

I assume it's (2,1,2) the unit are hard to see, but you start at the origin, move right 2 units, towards you 2 units, and up 1 unit. just note that up is Y, towards you is Z, right is X

Answer 2

how do I find out what point is at (4,3,6) ?

Answer 3

It's point D, the pinkish, start at the origin, go right 4. towards you 3. then up 6.

Answer 4

OK! I got you. Now how do I find out the distance between points A and B ?