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Subject: "concurrency in triangle"     Previous Topic | Next Topic
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Conferences The CTK Exchange High school Topic #376
Reading Topic #376
ionut onisor
Mar-15-08, 09:34 AM (EST)
"concurrency in triangle"
   let ABC be a triangle and BB' and CC' be altitudes of the triangle. draw the circle through B' and C' and tangent to circumcircle. let A" be the point of tangency and B" and C" similarly defined. prove that lines AA", BB" and CC" have a common point.

respectfully, ionut onisor
bucharest, romania

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Charter Member
2204 posts
Mar-16-08, 09:56 PM (EST)
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1. "RE: concurrency in triangle"
In response to message #0
   A'A'', B'B'', C'C'' also concurrent and the point of concurrency lies on the Euler line of ΔABC.

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