Des cours de géométrie en vidéo ...

... Malheureusement, en anglais ! Enfin, toujours utiles pour, selon nos connaissances antérieures, améliorer ses maths ou son anglais ! La page de l'auteur, Norman Wildberger, un mathématicien australien, est ici. Ci dessous, les liens directs vers les vidéos. Chacune dure entre 7 et 10 minutes (compter environ 20 Mo). Bon, il ne parle pas trop trop vite !

WildTrig0: An invitation to geometry: the WildTrig series.

WildTrig1: Why Trig is Hard

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.