La comunidad de olímpicos, ex-olímpicos, entrenadores y seguidores de la Olimpiada en Chihuahua, wherever they are in the world.
Por supuesto cualquier olímpico mexicano (para que parar ahí, de todo el mundo pues), esta invitado a comentar.
viernes, 29 de agosto de 2014
Viernes 29 Agosto
Let be the circumcenter of acutangle triangle and let be some point in the smallest arc of the circumcircle of . Let and points on sides and , respectively, such that and .
Prove that the line passes through the orthocenter of .
be the circumcenter of acutangle triangle 
and let 
be some point in the smallest arc 
of the circumcircle of 
and 
points on sides 
and 
, respectively, such that 
and 
. 
passes through the orthocenter of 
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