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Orthologic triangles 1

[APH]: Let ABC be a triangle and P a point. Denote: Ab, Ac = the orthogonal projections of A on BP,CP, resp. Ma = the midpoint of AbAc. Similarly Mb, Mc. A2,
Antreas Hatzipolakis
Aug 19

Homothetic triangles

[APH]: Let ABC be a triangle and A'B'C' the cevian triangle of I. Denote: Bc, Cb = the reflections of B, C in CC', BB', resp. Oa = the circumcenter of ABcCb.
Antreas Hatzipolakis
Jul 26

NPC - Homothetic triangles

... (Un théorème de Antreas Hatzipolakis, read de Telv Cohl) http://www.les-mathematiques.net/phorum/read.php?8,1126549,1127089 APH  Antreas Hatzipolakis
Antreas Hatzipolakis
Jul 23
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