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Atualmente, softwares como o Excel (Windows) e o Calc (Linux) são utilizados constantemente na construção de planilhas e gráficos
matemáticos. Os programas computacionais dinamizaram setores empresariais e despertaram o interesse de muitas pessoas. Os
cursos profissionalizantes na área da informática são responsáveis por formar pessoas capacitadas para esse tipo de trabalho. A escola
também possui sua parcela de contribuição nesse mercado profissional. É ela quem introduz os conceitos básicos que servirão de pré-
requisitos para futuras profissões.
No ensino fundamental, o aluno deve entrar em contato com o mundo da informação, analisando e interpretando informações através de
gráficos variados. As atividades envolvendo tabulação de dados e construções de gráficos precisam ser supervisionadas pelo professor.
Vamos envolver um exemplo na construção de um gráfico de setores.
A escola de Carlos promoveu uma olimpíada de Matemática entre os alunos do ensino fundamental. Todos os 1000 alunos participaram
da olimpíada que utilizou os seguintes critérios de avaliação: ótimo, bom, regular e ruim. Veja os resultados na tabela:
Precisamos agora construir a planilha das porcentagens.
Ótimo = 200/1000 = 0,2 = 20%
Bom = 600/1000 = 0,6 = 60%
Regular = 150/1000 = 0,15 = 15%
Ruim = 50/1000 = 5%
O gráfico de setores é construído dividindo a circunferência em regiões proporcionais aos dados percentuais. Em virtude de a
circunferência possuir um ângulo de 360º, cada valor em porcentagem deverá ser associado à medida de um ângulo central. Observe
como proceder:
Ótimo = 20% de 360º → 0,2 * 360º = 72º
Bom = 60% de 360º → 0,6 * 360º = 216º
Regular = 15% de 360º → 0,15 * 360º = 54º
Ruim = 5% de 360º → 18º
Para desenharmos o gráfico utilizamos régua e transferidor.

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Graf

  • 1. Atualmente, softwares como o Excel (Windows) e o Calc (Linux) são utilizados constantemente na construção de planilhas e gráficos matemáticos. Os programas computacionais dinamizaram setores empresariais e despertaram o interesse de muitas pessoas. Os cursos profissionalizantes na área da informática são responsáveis por formar pessoas capacitadas para esse tipo de trabalho. A escola também possui sua parcela de contribuição nesse mercado profissional. É ela quem introduz os conceitos básicos que servirão de pré- requisitos para futuras profissões. No ensino fundamental, o aluno deve entrar em contato com o mundo da informação, analisando e interpretando informações através de gráficos variados. As atividades envolvendo tabulação de dados e construções de gráficos precisam ser supervisionadas pelo professor. Vamos envolver um exemplo na construção de um gráfico de setores. A escola de Carlos promoveu uma olimpíada de Matemática entre os alunos do ensino fundamental. Todos os 1000 alunos participaram da olimpíada que utilizou os seguintes critérios de avaliação: ótimo, bom, regular e ruim. Veja os resultados na tabela: Precisamos agora construir a planilha das porcentagens. Ótimo = 200/1000 = 0,2 = 20% Bom = 600/1000 = 0,6 = 60% Regular = 150/1000 = 0,15 = 15% Ruim = 50/1000 = 5% O gráfico de setores é construído dividindo a circunferência em regiões proporcionais aos dados percentuais. Em virtude de a circunferência possuir um ângulo de 360º, cada valor em porcentagem deverá ser associado à medida de um ângulo central. Observe como proceder: Ótimo = 20% de 360º → 0,2 * 360º = 72º Bom = 60% de 360º → 0,6 * 360º = 216º Regular = 15% de 360º → 0,15 * 360º = 54º Ruim = 5% de 360º → 18º Para desenharmos o gráfico utilizamos régua e transferidor.