3 ms·
Draw (or, better, imagine) a cube with corners at (+-1,+-1,+-1). The plane through the ++- vertices is x+y+z=1. The plane through the +-- vertices is x+y+z=-1.
by gjm11 17y ago
Draw (or, better, imagine) a cube with corners at (+-1,+-1,+-1). The plane through the ++- vertices is x+y+z=1. The plane through the +-- vertices is x+y+z=-1. The plane you want is parallel to those and half-way between them. Does that help at all?
- pbhjpbhj 17y agoThanks to you and Jabavu, the "normal (1,1,1) vector through the origin" is the best description for me.