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Spread between lines
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Classroom Contents
Rational Trigonometry, Generalized Triangle Geometry and Four-Fold Incenter Symmetry
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- 1 Introduction
- 2 Quadrance between points
- 3 Pythagoras theorem
- 4 Blue Pythagoras
- 5 Red Pythagoras
- 6 Green Pythagoras
- 7 Triple quad formula
- 8 Spread between lines
- 9 Spread as a normalized squared determinant
- 10 Laws of affine rational trigonometry
- 11 Triangle geometry and the blue Euler line
- 12 Red Euler line
- 13 Green Euler line
- 14 Omega triangle and Chromogeometry
- 15 Triangle geometry with general bilinear forms
- 16 Standard coordinates
- 17 Standard quadrances and spreads
- 18 The Euler line
- 19 Bilines and Incenter formulas
- 20 Bilines, Incenters, Incircles, contact points
- 21 Gergonne points G
- 22 Nagel points
- 23 Gergonne-Nagel lines and X69
- 24 Isogonal and isotomic conjugates
- 25 Gergonne-Nagel lines and X69
- 26 Bevan points B
- 27 Mittenpunkts
- 28 Summary
- 29 Summary
- 30 Summary
- 31 Mittenpunkts
- 32 Coloured Incenter Circles
- 33 More info/References
