# Polarity from Chromogeometry

- Author:
- Paul Miller

HERE WE have divided two quadrances by a third to get a projection of the 'Triple Spread Formula/Function' showing the effect on paired-spreads on a triangle when it is rotated (the third spread being rendered 'invisible' by projection)

OUR rotation takes place in a 'blue' unit circle and so the effect is to vary the Red and Green bilinear form-defined spreads linearly.
WE HAPPILY decllare that a form of pole polar duality 'exists' in Chromogeometry!