The aim of this diploma work is to analyse problems solving of the second round of the 55th year of the Mathematical Olympiad in South Bohemian region and to serve as a study material for further Mathematical Olympiads or as a collection of problems for talented students.

Submitted by Marlene Santos (marlene.bc.ufg@gmail.com) on 2016-06-02T18:51:04Z No. of bitstreams: 2 Dissertação - Manoel Bernardes de Jesus- 2016.pdf: 8498646 bytes, checksum: df9ec5bab5a7bc205f3b14b7ac2d5b70 (MD5) license_rdf: 19874 bytes, checksum: 38cb62ef53e6f513db2fb7e337df6485 (MD5) / Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2016-06-03T12:08:15Z (GMT) No. of bitstreams: 2 Dissertação - Manoel Bernardes de Jesus- 2016.pdf: 8498646 bytes, checksum: df9ec5bab5a7bc205f3b14b7ac2d5b70 (MD5) license_rdf: 19874 bytes, checksum: 38cb62ef53e6f513db2fb7e337df6485 (MD5) / Made available in DSpace on 2016-06-03T12:08:15Z (GMT). No. of bitstreams: 2 Dissertação - Manoel Bernardes de Jesus- 2016.pdf: 8498646 bytes, checksum: df9ec5bab5a7bc205f3b14b7ac2d5b70 (MD5) license_rdf: 19874 bytes, checksum: 38cb62ef53e6f513db2fb7e337df6485 (MD5) Previous issue date: 2016-03-31 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / The aim of this paper is to present a study about Triangles, to study their concepts and their properties, the relations between their forms, mesures and areas, relation of Triangle with the Trigonometric and the Geometrics Builds. Besides to present Pythagoras’ Theorem with many proof relates to Triangles. / O objetivo deste trabalho é apresentar um estudo sobre Triângulos, seus conceitos e suas propriedades, as relações entre suas formas, medidas e áreas. Além da relação do Triângulo com a Trigonometria e as Construções Geométricas. Apresentamos o Teorema de Pitágoras com várias demonstrações relacionadas aos Triângulos.

Submitted by Daniele Amaral (daniee_ni@hotmail.com) on 2016-09-21T19:25:25Z No. of bitstreams: 1 DissAOL.pdf: 6820225 bytes, checksum: 00793d2a933ccdc18ce28c12bf53f7ac (MD5) / Approved for entry into archive by Ronildo Prado (ronisp@ufscar.br) on 2016-09-28T19:38:02Z (GMT) No. of bitstreams: 1 DissAOL.pdf: 6820225 bytes, checksum: 00793d2a933ccdc18ce28c12bf53f7ac (MD5) / Approved for entry into archive by Ronildo Prado (ronisp@ufscar.br) on 2016-09-28T19:38:13Z (GMT) No. of bitstreams: 1 DissAOL.pdf: 6820225 bytes, checksum: 00793d2a933ccdc18ce28c12bf53f7ac (MD5) / Made available in DSpace on 2016-09-28T19:43:11Z (GMT). No. of bitstreams: 1 DissAOL.pdf: 6820225 bytes, checksum: 00793d2a933ccdc18ce28c12bf53f7ac (MD5) Previous issue date: 2015-10-05 / Não recebi financiamento / This research aims to propose activities for teachers using the Geogebra software, especially for teachers from the SESI-SP School Network in order to assist them in the teaching methodology, with teachers' work plan and, in addition, aiming to more significant and dynamic classes, in order to allow students reach their teaching and learning expectations, formulate valid arguments, make conjectures and justify their reasoning. The activities were applied by teachers of SESI-SP School Network to the students of 9th grade of elementary school, in anticipation of teaching and learning through “Similarity”, addressing Theorem of Thales, Metrics Relations in the Rectangle Triangle and Pythagoras Theorem. The results were analyzed and discussed, reporting the challenges and conclusions raised by the students during the activities while working with the Geogebra software and also based on the feedback provided by the teachers and the opinion of the analysts from SESI-SP School Network. / Esta pesquisa tem como objetivo principal propor atividades para os professores utilizando o software Geogebra, principalmente para os docentes da rede SESI-SP de Ensino, a fim de auxiliá-los na metodologia de ensino, no plano de trabalho, visando uma aula mais significativa e dinâmica, para que seus alunos atinjam as expectativas de ensino e aprendizagem, formulem argumentos válidos, façam conjecturas e justifiquem seus raciocínios. As atividades foram aplicadas por professores da rede SESI-SP de Ensino aos alunos do 9º ano do Ensino Fundamental, turma de 2014, na expectativa de ensino e aprendizagem de “Semelhança”, abordando Teorema de Tales, Relações Métricas no Triângulo Retângulo e Teorema de Pitágoras. Os resultados foram analisados e discutidos, relatando as dificuldades e conclusões apresentadas pelos alunos em desenvolver as atividades trabalhando com o software Geogebra, baseado nas devolutivas dos professores envolvidos e o parecer feito pelos analistas educacionais da Rede SESI-SP de Ensino.

The thesis deals with the process of construction of mathematical knowledge of an individual and a group of pupils. At the outset, some concepts are discussed which belong to the theoretical background of our research (knowledge construction process and its mechanism, typology of mathematical knowledge, character of a mathematical structure, constructivist approaches to the teaching of mathematics, creative teaching, action research). Some results of selected local and foreign research focusing on constructivist approaches and action research in mathematics education are given. The methodology mainly consists of teaching experiments which can, to a certain extent, be seen as cycles of cooperative action research. The target group consists of pupils of lower secondary grammar school. The data gathered through traditional methods of qualitative research (participation observation, audio and videorecordings, pupils' artefacts, notes of an external observer, etc.) were analysed using the techniques of grounded theory. The research has generated results of three types: (1) The categories of individual and group constructions in mathematics have been described in depth including their dimensions (the measures of the teacher's influence on the construction, of the pupils' cooperation, of pupils' formal acceptance...