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Une nouvelle video.

Norman Wildberger does not stop in so good way! Also, here is a new video of him that I have no doubt, will become your favorite Canadian living in Australia! This time, he reveals the secrets of homogeneous coordinates. Meaning not so obvious that we encounter every day yet! Indeed, most of 3D rendering engines (games, 3D applications, etc..) use this method of calculation for the display of the 2D projection of a 3D scene on a screen. This is where it happens (yes, always in English!):

WildTrig 33: Projective geometry and homogeneous coordinates .

See also the other 32 video lectures .

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Un générateur d'exercices en ligne !

An application that works either online or locally and generates exercises of math or geometry, and their corrected! It exists and it's called Pyromath ! The installation of the application locally involves the use of MikTeX (the application uses the language to generate LaTeX sheets in pdf form with beautifully written!). I personally prefer the online version. For now, the exercises cover the program generated the 6 th to the 3 rd (for Surveyor herbs then!). So be a test ! Once you have clicked on "create" your browser will suggest you to save a zip archive. The latter contains a form of exercise and a corrected form.

FYI Framasoft tells us that there are other such resources online: ChingAtome , bases Syracuse, Euler . Good reviews!

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Des cours de géométrie en vidéo ...

... 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 .

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 .