... Unfortunately, in English! Finally, always helpful, according to our previous knowledge, improve their math or English! The page's author, Norman Wildberger, an Australian mathematician, is here. Below, direct links to videos. Each lasts between 7 and 10 minutes (approximately 20 MB). Well, he does not talk too much too fast! WildTrig0: An invitation to geometry: the WildTrig series .
WildTrig2: Quadrance via Pythagoras and Archimedes
WildTrig3: Spread, angles and astronomy .
WildTrig4: Five main laws of rational trigonometry .
WildTrig5: Applications of rational trigonometry .
WildTrig6: Heron's formula viewed rationally .
WildTrig7: Solving triangles with rational trigonometry .
WildTrig8: Centers of triangles with rational trigonometry .
WildTrig9: The laws of proportion for a triangle .
WildTrig10: Geometry of circles with rational trigonometry .
WildTrig11: Applications of rational trig to surveying (I).
WildTrig12: Cartesian coordinates and geometry .
WildTrig13: Why spreads are better than angles .
WildTrig14: Rational parameters for circles .
WildTrig15: Complex numbers and rotations .
WildTrig16: Rational Trigonometry Quiz 1 .
WildTrig17: Rational trigonometry: Solutions to Quiz 1 .
WildTrig18: Medians, altitudes and vertex bisectors.
WildTrig19: Trigonometry with finite fields (I) .
WildTrig20: Trigonometry with Finite Fields (II) .
WildTrig21: Trigonometry with Finite Fields (III) .
WildTrig22: Highlights from triangle geometry (I) .
WildTrig23: Highlights from triangle geometry (II) .
WildTrig24: Spread polynomials .
WildTrig25: Pentagons and five-fold symmetry .
WildTrig26: Applications of rational trig to surveying (II) .
WildTrig27: Stewart's theorem .
WildTrig28: What size ladder fits around a corner ?
WildTrig29: Trisecting angles and Hadley's theorem .
WildTrig30: Polar coordinates and rational trigonometry .
WildTrig31: Introduction to Projective Geometry .
WildTrig32: Projective geometry and perspective .
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