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Apollonius circles

efn4900 — Fri, 20 Nov 2009 10:06:01 GMT

Dear friends, in 2003 there were some messages about the "JENKINS" circles starting with message nr 7292 Here is another variation of this configuration

Re: Wilson Stothers has left us

Antreas Hatzipolakis — Wed, 18 Nov 2009 19:33:08 GMT

... What sad news ! Wilson Stothers had put in his web site interesting Triangle Geometry material. .

Wilson Stothers has left us

Bernard Gibert — Wed, 18 Nov 2009 16:06:09 GMT

Dear friends, Professor Stephen D Cohen from the University of Glasgow informs me that our friend Wilson Stothers died in July this year. I feel sorry since he

Hello Paul

Ricardo Barroso — Mon, 16 Nov 2009 16:35:50 GMT

Hello Paul,.... pdf ... does not work .. http://forumgeom.fau.edu/FG2009volume9/FG200928.pdf greetings Ricardo ________________________________ De: ForumGeom

Forum Geometricorum

ForumGeom — Mon, 16 Nov 2009 15:12:59 GMT

The following paper has been published in Forum Geometricorum. It can be viewed at http://forumgeom.fau.edu/FG2009volume9/FG200927index.html The editors Forum

Re: Fwd: Poristic triangles

Nikolaos Dergiades — Fri, 13 Nov 2009 17:23:07 GMT

Dear Alexey [AZ] ... OI^2/R = R - 2r and this locus is the same as the locus of the orthocenter of XYZ. Best regards Nikos Dergiades

Fwd: Poristic triangles

Antreas Hatzipolakis — Fri, 13 Nov 2009 16:05:33 GMT

... From: alexey_zaslavsky Date: Fri, Nov 13, 2009 at 4:53 PM Subject: Re: Poristic triangles To: Hyacinthos-owner@yahoogroups.com

Mixtilinear Excircles

HaroldC — Fri, 13 Nov 2009 14:35:40 GMT

Dear Friends, I have been doing some work on the second generation of the Apollonian structure of the triangle which produces the mixtilinear incircles and the

Re: [SPAM] [EMHL] Poristic triangles

Paris Pamfilos — Fri, 13 Nov 2009 10:54:56 GMT

Dear Bernard I saw today your message. I am interested if your results relate to X(264) discussed in a short note in my gallery

Re: Poristic triangles

Antreas — Thu, 12 Nov 2009 23:44:19 GMT

Dear Nikos [ND] ... And in the french edition (in the 5th, that I have) is written R/2 - r APH

Re: Poristic triangles

Nikolaos Dergiades — Thu, 12 Nov 2009 22:16:19 GMT

Dear Bernard, I have not the reference you want but by the way of your question I have something to notice that perhaps you just know. Since the NPC is tangent

Re: Poristic triangles

Antreas — Thu, 12 Nov 2009 19:53:41 GMT

... From: alexey_zaslavsky Date: Thu, Nov 12, 2009 at 5:08 PM Subject: Re: Poristic triangles To: Hyacinthos-owner@yahoogroups.com

Re: Poristic triangles

Antreas — Thu, 12 Nov 2009 19:52:32 GMT

Dear Bernard [BG] ... Prove that the Simson LInes of triangles with the same incircles and circumcircles for a fixed point on the circumference are concurrent.

Poristic triangles

Bernard Gibert — Thu, 12 Nov 2009 11:09:06 GMT

Dear friends, on the internet one can find several assertions concerning poristic triangles but I didn't manage to find any references. Can someone help ? 1.

Cevian circle of incenter

van Tienhoven — Thu, 12 Nov 2009 07:23:28 GMT

Dear Eric, [ED] ... cevian circle of the incenter. ... the incenter! ... the ninepointcircle ... and the incircle ... I don't have a reference to this special