Submitted by Izabel Franco (izabel-franco@ufscar.br) on 2016-10-26T19:04:54Z No. of bitstreams: 1 DissFLC.pdf: 1637955 bytes, checksum: b94dbdba30fb59739948038e7cc356cf (MD5) / Approved for entry into archive by Marina Freitas (marinapf@ufscar.br) on 2016-11-08T18:30:42Z (GMT) No. of bitstreams: 1 DissFLC.pdf: 1637955 bytes, checksum: b94dbdba30fb59739948038e7cc356cf (MD5) / Approved for entry into archive by Marina Freitas (marinapf@ufscar.br) on 2016-11-08T18:30:48Z (GMT) No. of bitstreams: 1 DissFLC.pdf: 1637955 bytes, checksum: b94dbdba30fb59739948038e7cc356cf (MD5) / Made available in DSpace on 2016-11-08T18:30:55Z (GMT). No. of bitstreams: 1 DissFLC.pdf: 1637955 bytes, checksum: b94dbdba30fb59739948038e7cc356cf (MD5) Previous issue date: 2016-09-02 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / We introduce some geometric experiments to the students, and particularly the handling of right-angled triangles, with the clear purpose of inserting, firming and emphasizing the importance, historical and practical, of the concept and meaning of the geometric tangent in an entire acute angle in triangle. Later, the students built a rudimentary theodolite that was used to measure vertical angles of tops inaccessible objects from the ground and consequently the estimate of their heights. The prospect objects were trees, poles, masts, antennas, spotlights, among other more familiar to the students of the ninth grade in elementary school. / Neste trabalho apresentamos aos alunos alguns experimentos geométricos e, sobretudo, a manipulação de triângulos retângulos, com o claro objetivo de inserir, fixar e ressaltar a importância, histórica e prática, do conceito e do significado geométrico da tangente de um ângulo agudo. Posteriormente, os alunos construíram um teodolito rudimentar que foi utilizado para medir ângulos verticais de topos de objetos inacessíveis em relação ao solo e consequentemente o cálculo de suas alturas. Os objetos explorados foram árvores, postes, mastros, antenas, refletores, entre outros mais familiares para os estudantes do nono ano do Ensino Fundamental.