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Chromogeometry : Euler lines and Nine-point circles

Autor:Lionel GERVAIS

Watch the YouTube videos :

Chromogeometry and nine-point circles | WildTrig: Intro to Rational Trigonometry | N J Wildberger
Chromogeometry and Euler lines | WildTrig: Intro to Rational Trigonometry | N J Wildberger

Move points A1, A2 or A3 of the triangle

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