Σάββατο 17 Μαρτίου 2012

HOW THEY DO GEOMETRY IN CHINA

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X(72899) = X(4)X(145)∩X(11)X(57) Barycentrics    2*a^6-2*a^5*b-a^4*b^2-2*a^3*b^3+2*a^2*b^4+4*a*b^5-3*b^6-2*a^5*c+4*a^4*b*c+2*a^3*b^2*c+6*a...

  • EUCLID 4404
  • HOMOTHETIC TRIANGLES and EULER LINES
    Theorem 1. Let ABC be an equilateral triangle and P a point. The Euler lines of the triangles PBC,PCA,PAB are concurent.Denote the point ...
  • ETC
    X(5459) Let ABC be a triangle, let A', B', C' be the midpoints of BC, CA, AB. Let L_a be the perpendicular through A' ...