þÿ<html> <head> <title>Triângulos - II - GeoGebra Planilha dinâmica</title> <meta name="generator" content="GeoGebra"> <style type="text/css"><!--body { font-family:Helvetica,sans-serif; margin-left:40px }--></style> </head> <body background="nuvem.jpg"> <table border="0" width="600" style="border-width: 0px"> <tr><td style="border-style: none; border-width: medium"> <table border="1" style="border-collapse: collapse; border-width: 0px" width="100%" id="table1"> <tr> <td style="border-style: none; border-width: medium" width="476"> <h2><font face="Century Gothic">Tri&#226;ngulos - II</font></h2> <p><font face="Century Gothic"><i><b>Construção de um triângulo equilátero.</b></i></font></p> </td> <td style="border-style: none; border-width: medium"> <font face="Century Gothic"> <img border="0" src="logo_vmn.jpg" width="120" height="76"></font></td> </tr> </table> <p> <font face="Century Gothic">Marca dois pontos <i>A</i> e <i>B</i>.<br/> Constr&#243;i:</font></p> <ul> <li><font face="Century Gothic">o segmento de recta [<i>AB</i>];</font></li> <li><font face="Century Gothic">as circunferências com centro em <i>A</i> e <i> B</i> e de raio [<i>AB</i>];</font></li> <li><font face="Century Gothic">um ponto <i>C</i> na intersecção das duas circunferências;</font></li> <li><font face="Century Gothic">o segmento de recta [<i>BC</i>] e [<i>CA</i>].</font></li> </ul> <p> <font face="Century Gothic">Observa que os valores de <i>a</i>, <i>b</i> e <i>c</i>, à esquerda, corresponde a medida do comprimento dos segmentos.<br/>Mede o menor dos &#226;ngulos formados pelos segmentos de recta em cada um v&#233;rtices do tri&#226;ngulo [<i>ABC</i>].</font></p> <font face="Century Gothic"> <applet code="geogebra.GeoGebraApplet" codebase="./" archive="geogebra.jar" width="600" height="350"> <param name="filename" value="triangulos.ggb"> <param name="framePossible" value="false"> <param name="showToolBar" value="true"> <param name="customToolBar" value=" 0 | 1 | 15 | 10 | 36 | 16"> <param name="showAlgebraInput" value="true"> Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and activated. (<a href="http://java.sun.com/getjava">click here to install Java now</a>) </applet> </font> <p> <font face="Century Gothic">Movimenta os pontos <i>A</i> e <i>B</i>. O que observas?<br/> &nbsp;</font></p> <p><font face="Century Gothic"><span style="font-size:small">Jos&#233; Manuel Dos Santos Dos Santos, 25-02-2007, Criado com <a href="http://www.geogebra.at" target="_blank" >GeoGebra</a></span></font></p></td></tr> </table></body> </html>