a) top view(w*1, shear along x)
b) front view (taken as is)
c) side view(x*1, shear along y)

Cavalier Projection is like cabinet projection but without foreshortening the third dimension.

The angle for the third axis is chosen arbitrarily in both of these two projections: for pixel art, 45 degrees is most convenient because it can be represented without AA.

further reading:

• Cavalier Projection