Nickolas

How come Omi67
and

asinus
 

Are not on 

I have a question 

Hi Math is awsome

Well for your second question it would be 

15*13= 195

Well your first question would be then 570

X=6

Y=6

Thanks Now I get it.

Could someone show me the steps of how to do this

Well hear is the definition of space Diagnal 

In geometry a space diagonal (or interior diagonal or body diagonal) of a polyhedron is a line connecting two vertices that are not on the same face. Space diagonals contrast with face diagonals, which connect vertices on the same face (but not on the same edge) as each other.'

Hope the definition helps