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Geometria descritiva
(Universidade Federal do Rio grande do Sul (UFRGS), Instituto de Matemática (IM), Educação Matemática e Tecnologia Informática (Edumatec), 2016)
Geometria descritiva
(Universidade Federal do Rio grande do Sul (UFRGS), Instituto de Matemática (IM), Educação Matemática e Tecnologia Informática (Edumatec), 2011)
The product of the inradius and three exradii
(Wolfram Demonstration Project, 2016)
Another variant of Kosnita's theorem
(Wolfram Demonstration Project, 2016)
A concurrency of lines joining orthocenters
(Wolfram Demonstration Project, 2016)
An angle bisection
(Wolfram Demonstration Project, 2016)
Cassini ovals and other curves
(Wolfram demonstrations project, 2016)
Kosnita's theorem
(Wolfram Demonstration Project, 2016)
Intersecting circles and a right angle
(Wolfram Demonstration Project, 2016)