Geometria básica no plano: áreas e perímetros: Difference between revisions

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Line 10: Line 10:
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  b = Math.abs(pa.X()); h = Math.abs(pa.Y());
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  var s    = board.create('polygon',["A","B","C","D"]);
  var sarea = board.createElement('text',[3  ,2.5,function(){side=2*Math.abs(pas.X());area = side*side;return "&aacute;rea = "+area.toFixed(6);}]);  
  var sarea = board.create('text',[3  ,2.5,function(){side=2*Math.abs(pas.X());area = side*side;return "&aacute;rea = "+area.toFixed(6);}]);  
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Line 57: Line 57:
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Line 72: Line 72:
  area = sidea*sideb;
  area = sidea*sideb;
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  return "&aacute;rea = "+area.toFixed(6);}]);
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Line 107: Line 107:
<i>Última alteração em 23/07/2009</i></p><p>
<i>Última alteração em 23/07/2009</i></p><p>
Todos os gráficos interactivos foram criados com recurso à livraria  
Todos os gráficos interactivos foram criados com recurso à livraria  
<a href="http://jsxgraph.uni-bayreuth.de/wp/">JSXgraph</a>.  
<a href="https://jsxgraph.org">JSXGraph</a>.  
</body>
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[[Category:Contributions]]
[[Category:Contributions]]

Latest revision as of 10:56, 23 June 2021

  • Triângulo rectângulo: b = base, h = altura, logo área = ( b × h )/2 e perímetro = b + h + (b2+h2)1/2.

    Arraste o ponto A para ver a variação do perímetro e da área com a variação da base e da altura:

  • Quadrado: a = lado (ou aresta), logo área = a2 e perímetro = 4a.

    Arraste o ponto A para ver a variação do perímetro e da área com a variação da aresta:

  • Rectangulo: a = lado 1, b = lado 2, logo área = a×b e perímetro = 2a + 2b.

    Arraste o ponto A para ver a variação do perímetro e da área com a variação dos lados:

  • Círculo: r = raio do círculo, logo área = πr2 e perímetro = 2πr.

    Arraste o ponto P para ver a variação do perímetro da circunferência e da área do círculo com a variação do raio:

Última alteração em 23/07/2009

Todos os gráficos interactivos foram criados com recurso à livraria JSXGraph.

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