(14)From: César Lozada [APH] Generalization: Let ABC be a triangle and Q, Q* two isogonal conjugate points and P a variable point. Which is the locus of P such
(4)Let ABC be a triangle and P a point. The AP line intersects the circle with diameter BC at A' on the negative side of BC (ie not on the side the vertex A is).
(4)... circumcenter of triangles BPC,CPA,APB. >Let A',B',C' be midpoints of AOa,BOb,COc then NPC center of A'B'C' lies on Euler line of ABC. Denote Np = the NPC
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(4)Let ABC be a triangle and I1,I2,I3 the reflections of I in BC,CA,AB, resp. Denote: I12, I13 = the orthogonal projections of I1 on AC,AB, resp. I23, I21 = the
(3)Let ABC be a triangle, P a point and PaPbPc the antipedal triangle of P. Denote: AaAbAc, BaBbBc, CaCbCc = the pedal triangles of Pa, Pb, Pc, resp. A'B'C.' =
(14)Orthologic centers and homography Angel Montesdeoca, Centros ortológicos y homografía ...
(5)[A variation of a configuration by APH] Let ABC be a triangle, A'B'C' a variable triangle w/r to ABC and A1B1C1, A2B2C2 the medial triangles of ABC, A'B'C',
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