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Orthologic triangles 1

(3)
[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
3
posts
Aug 19

Re: Parallelogic - Loci

(3)
... Let PaPbPc the antipedal triangle of P. Which is the locus of P such that the parallels to Ra,Rb,Rc through Pa, Pb, Pc, resp. are concurrent? The whole
Antreas Hatzipolakis
3
posts
Jul 30

Homothetic triangles

(7)
[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
7
posts
Jul 26
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