How to model a square (starting with one vertex)? I have a simple question. What is the easiest way to model a perfect square starting with one vertex and just extruding that vertex around ?
Or :
Presuming the first vertex is selected :

E 
X
1 Extrude along X axis 1 unit

A
A Double A, to first deselect the extruded vertex, but A again to select them all

E
Y
1 Now extrude both two precedent vertices to make the square