transformrotate(angle), skewX(angle) and
skewY(angle)
The angle may be given in degrees, radians, or as a turn
When skewing, an angle of 90 degrees will make the element disappear.
There is a skew(x,y) function but its use is not
recommended.
See the code
rotate(0) rotate(45deg) rotate(-45deg) rotate(2rad) rotate(0.5turn) skewX(30deg) skewX(-30deg) skewY(45deg) skewY(-45deg)