p4
Rotations only.
Four-fold centers in two locations,
two-fold centers in one location.
From Kathy Paur:
![p4-1](p4-1.jpg)
p4gm
Perpendicular mirrors.
Four-fold rotation centers in two locations.
Two-fold centers in two locations.
From Kathy Paur:
![p4gm-1](p4gm-1.jpg)
p4mm
Mirrors in four directions.
Four-fold rotation centers in two locations.
Two-fold centers in two locations.