domingo, 29 de setembro de 2013
INSCRIBED CIRCLE OF GENERAL SEMI-REGULAR POLYGON AND SOME OF ITS FEATURES NENAD U. STOJANOVIC
INTERNATIONAL JOURNAL OF GEOMETRY Vol. 2 (2013), No. 1, 5 - 22 INSCRIBED CIRCLE OF GENERAL SEMI-REGULAR POLYGON AND SOME OF ITS FEATURES
NENAD U. STOJANOVIC
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http://ijgeometry.com/wp-content/uploads/2013/04/1.pdf
sábado, 28 de setembro de 2013
PERU GANHA MEDALHAS DE PRATA E BRONZE NA XVIII OLIMPIADA IBEROAMERICANA DE MATEMATICAS
AGRADECENDO A COLABORAÇÃO DO SITE PERUANO MATEMATICAS E OLIMPIADAS
LINK http://www.matematicasyolimpiadas.org/
Christian Suyo Burga 35 puntos Medalla de Plata
Kevin Aza Valencia 30 puntos Medalla de Bronce
Jimmy Espinoza Palacios 29 puntos Medalla de Bronce
Medalla de bronce 21 puntos
PARABENS PELA MEDALHAS DE PRATA E BRONZE VOCES SÃO A DEMOSTRAÇAO QUE COM DISCIPLINA,ESTUDO,PERSEVERANCIA SE VÃO LONGE,A CONTINUAR TREINANDO E ESTUDANDO HOJE PRATA E BRONZE,AMANHA A CONQUISTAR AS MEDALHAS DE OURO ,FELICIDADES.
LINK http://www.matematicasyolimpiadas.org/
Resultados de la Olimpiada Iberoamericana de Matemática
==============================================
Christian Altamirano Modesto 41 puntos Medalla de PlataChristian Suyo Burga 35 puntos Medalla de Plata
Kevin Aza Valencia 30 puntos Medalla de Bronce
Jimmy Espinoza Palacios 29 puntos Medalla de Bronce
Cabe mencionar los cortes de puntajesde medallas, que por cierto estuvieron bastante altos, sobre todo el de oro.
Medalla de oro 42 puntos, es decir puntaje perfecto, solo se dieron 5 medallas de oro.
Medalla de plata 31 puntosMedalla de bronce 21 puntos
PARABENS PELA MEDALHAS DE PRATA E BRONZE VOCES SÃO A DEMOSTRAÇAO QUE COM DISCIPLINA,ESTUDO,PERSEVERANCIA SE VÃO LONGE,A CONTINUAR TREINANDO E ESTUDANDO HOJE PRATA E BRONZE,AMANHA A CONQUISTAR AS MEDALHAS DE OURO ,FELICIDADES.
Journal of Classical GEOMETRY
The Journal of Classical Geometry is a refereed electronic journal devoted to problems of classical Euclidean geometry. It is addressed for school teachers, advanced high-school students, and everyone with an interest in classical geometry. The journal values synthetic arguments, intelligibility and illustration.
The journal focuses on new results in triangle geometry, geometry of conics, non-Euclidean and elementary combinatorial geometry. New synthetic proofs for known facts and interesting unsolved problems are also welcome.
Abstract Article
2. Alexey A. Pakharev, On certain transformations preserving perspectivity of triangles, pp. 6-16.
Abstract Article
3. Lev A. Emelyanov and Pavel A. Kozhevnikov, Isotomic similarity, pp. 17-22.
Abstract Article
4. Arseniy V. Akopyan, Conjugation of lines with respect to a triangle, pp. 23-31.
Abstract Article
5. Nguyen Minh Ha, A proof of Vittas’ Theorem and its converse, pp. 32-39.
Abstract Article
6. Darij Grinberg, Ehrmann’s third Lemoine circle, pp. 40-52.
Abstract Article
7. Nikolai Ivanov Beluhov, An elementary proof of Lester’s theorem, pp. 53-56.
Abstract Article
8. Dmitry S. Babichev, Circles touching sides and the circumcircle for inscribed quadrilaterals, pp. 57-61.
Abstract Article
9. Vladimir N. Dubrovsky, Two applications of a lemma on intersecting circles, pp. 62-64.
Abstract Article
10. Alexey A. Zaslavsky, Geometry of Kiepert and Grinberg–Myakishev hyperbolas, pp. 65-71.
Abstract Article
11. Problem section, pp. 72-74. pdf
12. Geometrical olympiad in honor of I.F. Sharygin, pp. 75-86. pdf
DOWNLOAD the whole volume:pdf.
WEBSITE ORIGINAL
http://jcgeometry.org/articles.php
The journal focuses on new results in triangle geometry, geometry of conics, non-Euclidean and elementary combinatorial geometry. New synthetic proofs for known facts and interesting unsolved problems are also welcome.
Volume 1 (2012)
Order the paper version
1. Ilya I. Bogdanov, Two theorems on the focus-sharing ellipses: a three-dimensional view, pp. 1-5.Abstract Article
2. Alexey A. Pakharev, On certain transformations preserving perspectivity of triangles, pp. 6-16.
Abstract Article
3. Lev A. Emelyanov and Pavel A. Kozhevnikov, Isotomic similarity, pp. 17-22.
Abstract Article
4. Arseniy V. Akopyan, Conjugation of lines with respect to a triangle, pp. 23-31.
Abstract Article
5. Nguyen Minh Ha, A proof of Vittas’ Theorem and its converse, pp. 32-39.
Abstract Article
6. Darij Grinberg, Ehrmann’s third Lemoine circle, pp. 40-52.
Abstract Article
7. Nikolai Ivanov Beluhov, An elementary proof of Lester’s theorem, pp. 53-56.
Abstract Article
8. Dmitry S. Babichev, Circles touching sides and the circumcircle for inscribed quadrilaterals, pp. 57-61.
Abstract Article
9. Vladimir N. Dubrovsky, Two applications of a lemma on intersecting circles, pp. 62-64.
Abstract Article
10. Alexey A. Zaslavsky, Geometry of Kiepert and Grinberg–Myakishev hyperbolas, pp. 65-71.
Abstract Article
11. Problem section, pp. 72-74. pdf
12. Geometrical olympiad in honor of I.F. Sharygin, pp. 75-86. pdf
DOWNLOAD the whole volume:pdf.
WEBSITE ORIGINAL
http://jcgeometry.org/articles.php
IX Geometrical Olympiad in honour of I.F.Sharygin Final round. Ratmino, 2013, August 1
IX Geometrical Olympiad in honour of I.F.Sharygin
Final round. Ratmino, 2013, August 1
Solutions
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http://www.mediafire.com/?pumhui2tpipu1xd
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