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MSFPnav14h=MSFPpreload("_derived/fiche_rectangle.htm_cmp_blitz010_vbtn_a.gif"); } // --></script><a href="fiche_rectangle.htm" language="JavaScript" onmouseover="if(MSFPhover) document['MSFPnav14'].src=MSFPnav14h.src" onmouseout="if(MSFPhover) document['MSFPnav14'].src=MSFPnav14n.src"><img src="_derived/fiche_rectangle.htm_cmp_blitz010_vbtn.gif" width="140" height="40" border="0" alt="Le rectangle" name="MSFPnav14"></a><br><script language="JavaScript"><!-- if(MSFPhover) { MSFPnav15n=MSFPpreload("_derived/fiche_losange.htm_cmp_blitz010_vbtn.gif"); MSFPnav15h=MSFPpreload("_derived/fiche_losange.htm_cmp_blitz010_vbtn_a.gif"); } // --></script><a href="fiche_losange.htm" language="JavaScript" onmouseover="if(MSFPhover) document['MSFPnav15'].src=MSFPnav15h.src" onmouseout="if(MSFPhover) document['MSFPnav15'].src=MSFPnav15n.src"><img src="_derived/fiche_losange.htm_cmp_blitz010_vbtn.gif" width="140" height="40" border="0" alt="Le losange" name="MSFPnav15"></a><br><script language="JavaScript"><!-- if(MSFPhover) { MSFPnav16n=MSFPpreload("_derived/fiche_carre.htm_cmp_blitz010_vbtn.gif"); MSFPnav16h=MSFPpreload("_derived/fiche_carre.htm_cmp_blitz010_vbtn_a.gif"); } // --></script><a href="fiche_carre.htm" language="JavaScript" onmouseover="if(MSFPhover) document['MSFPnav16'].src=MSFPnav16h.src" onmouseout="if(MSFPhover) document['MSFPnav16'].src=MSFPnav16n.src"><img src="_derived/fiche_carre.htm_cmp_blitz010_vbtn.gif" width="140" height="40" border="0" alt="Le carr" name="MSFPnav16"></a><br><script language="JavaScript"><!-- if(MSFPhover) { MSFPnav17n=MSFPpreload("_derived/fiche_polygone.htm_cmp_blitz010_vbtn.gif"); MSFPnav17h=MSFPpreload("_derived/fiche_polygone.htm_cmp_blitz010_vbtn_a.gif"); } // --></script><a href="fiche_polygone.htm" language="JavaScript" onmouseover="if(MSFPhover) document['MSFPnav17'].src=MSFPnav17h.src" onmouseout="if(MSFPhover) document['MSFPnav17'].src=MSFPnav17n.src"><img src="_derived/fiche_polygone.htm_cmp_blitz010_vbtn.gif" width="140" height="40" border="0" alt="Les polygones" name="MSFPnav17"></a><br><script language="JavaScript"><!-- if(MSFPhover) { MSFPnav18n=MSFPpreload("_derived/fiche_volumes.htm_cmp_blitz010_vbtn.gif"); MSFPnav18h=MSFPpreload("_derived/fiche_volumes.htm_cmp_blitz010_vbtn_a.gif"); } // --></script><a href="fiche_volumes.htm" language="JavaScript" onmouseover="if(MSFPhover) document['MSFPnav18'].src=MSFPnav18h.src" onmouseout="if(MSFPhover) document['MSFPnav18'].src=MSFPnav18n.src"><img src="_derived/fiche_volumes.htm_cmp_blitz010_vbtn.gif" width="140" height="40" border="0" alt="Volumes" name="MSFPnav18"></a><br><script language="JavaScript"><!-- if(MSFPhover) { MSFPnav19n=MSFPpreload("_derived/fiche_section.htm_cmp_blitz010_vbtn.gif"); MSFPnav19h=MSFPpreload("_derived/fiche_section.htm_cmp_blitz010_vbtn_a.gif"); } // --></script><a href="fiche_section.htm" language="JavaScript" onmouseover="if(MSFPhover) document['MSFPnav19'].src=MSFPnav19h.src" onmouseout="if(MSFPhover) document['MSFPnav19'].src=MSFPnav19n.src"><img src="_derived/fiche_section.htm_cmp_blitz010_vbtn.gif" width="140" height="40" border="0" alt="Sections de solides" name="MSFPnav19"></a><br><script language="JavaScript"><!-- if(MSFPhover) { MSFPnav20n=MSFPpreload("_derived/fiche_calcullitteral.htm_cmp_blitz010_vbtn.gif"); MSFPnav20h=MSFPpreload("_derived/fiche_calcullitteral.htm_cmp_blitz010_vbtn_a.gif"); } // --></script><a href="fiche_calcullitteral.htm" language="JavaScript" onmouseover="if(MSFPhover) document['MSFPnav20'].src=MSFPnav20h.src" onmouseout="if(MSFPhover) document['MSFPnav20'].src=MSFPnav20n.src"><img src="_derived/fiche_calcullitteral.htm_cmp_blitz010_vbtn.gif" width="140" height="40" border="0" alt="Calcul littral" name="MSFPnav20"></a><br><script language="JavaScript"><!-- if(MSFPhover) { MSFPnav21n=MSFPpreload("_derived/fiche_equation.htm_cmp_blitz010_vbtn.gif"); MSFPnav21h=MSFPpreload("_derived/fiche_equation.htm_cmp_blitz010_vbtn_a.gif"); } // --></script><a href="fiche_equation.htm" language="JavaScript" onmouseover="if(MSFPhover) document['MSFPnav21'].src=MSFPnav21h.src" onmouseout="if(MSFPhover) document['MSFPnav21'].src=MSFPnav21n.src"><img src="_derived/fiche_equation.htm_cmp_blitz010_vbtn.gif" width="140" height="40" border="0" alt="Les quations" name="MSFPnav21"></a><br><script language="JavaScript"><!-- if(MSFPhover) { MSFPnav22n=MSFPpreload("_derived/fiche_inequation.htm_cmp_blitz010_vbtn.gif"); MSFPnav22h=MSFPpreload("_derived/fiche_inequation.htm_cmp_blitz010_vbtn_a.gif"); } // --></script><a href="fiche_inequation.htm" language="JavaScript" onmouseover="if(MSFPhover) document['MSFPnav22'].src=MSFPnav22h.src" onmouseout="if(MSFPhover) document['MSFPnav22'].src=MSFPnav22n.src"><img src="_derived/fiche_inequation.htm_cmp_blitz010_vbtn.gif" width="140" height="40" border="0" alt="Encadrements, inquations" name="MSFPnav22"></a><br><script language="JavaScript"><!-- if(MSFPhover) { MSFPnav23n=MSFPpreload("_derived/fiche_fraction.htm_cmp_blitz010_vbtn.gif"); MSFPnav23h=MSFPpreload("_derived/fiche_fraction.htm_cmp_blitz010_vbtn_a.gif"); } // --></script><a href="fiche_fraction.htm" language="JavaScript" onmouseover="if(MSFPhover) document['MSFPnav23'].src=MSFPnav23h.src" onmouseout="if(MSFPhover) document['MSFPnav23'].src=MSFPnav23n.src"><img src="_derived/fiche_fraction.htm_cmp_blitz010_vbtn.gif" width="140" height="40" border="0" alt="Les fractions" name="MSFPnav23"></a><br><script language="JavaScript"><!-- if(MSFPhover) { MSFPnav24n=MSFPpreload("_derived/fiche_puissances.htm_cmp_blitz010_vbtn.gif"); MSFPnav24h=MSFPpreload("_derived/fiche_puissances.htm_cmp_blitz010_vbtn_a.gif"); } // --></script><a href="fiche_puissances.htm" language="JavaScript" onmouseover="if(MSFPhover) document['MSFPnav24'].src=MSFPnav24h.src" onmouseout="if(MSFPhover) document['MSFPnav24'].src=MSFPnav24n.src"><img src="_derived/fiche_puissances.htm_cmp_blitz010_vbtn.gif" width="140" height="40" border="0" alt="Puissances" name="MSFPnav24"></a><br><script language="JavaScript"><!-- if(MSFPhover) { MSFPnav25n=MSFPpreload("_derived/fiche_racine.htm_cmp_blitz010_vbtn.gif"); MSFPnav25h=MSFPpreload("_derived/fiche_racine.htm_cmp_blitz010_vbtn_a.gif"); } // --></script><a href="fiche_racine.htm" language="JavaScript" onmouseover="if(MSFPhover) document['MSFPnav25'].src=MSFPnav25h.src" onmouseout="if(MSFPhover) document['MSFPnav25'].src=MSFPnav25n.src"><img src="_derived/fiche_racine.htm_cmp_blitz010_vbtn.gif" width="140" height="40" border="0" alt="Racine carre" name="MSFPnav25"></a><br><script language="JavaScript"><!-- if(MSFPhover) { MSFPnav26n=MSFPpreload("_derived/fiche_affine.htm_cmp_blitz010_vbtn.gif"); MSFPnav26h=MSFPpreload("_derived/fiche_affine.htm_cmp_blitz010_vbtn_a.gif"); } // --></script><a href="fiche_affine.htm" language="JavaScript" onmouseover="if(MSFPhover) document['MSFPnav26'].src=MSFPnav26h.src" onmouseout="if(MSFPhover) document['MSFPnav26'].src=MSFPnav26n.src"><img src="_derived/fiche_affine.htm_cmp_blitz010_vbtn.gif" width="140" height="40" border="0" alt="Fonctions affines" name="MSFPnav26"></a> <p align="center"><IMG SRC="../petitexomath.gif" BORDER=0 ALIGN="middle" width="100" height="100" ></p>  <!--mstheme--></font></td><td valign="top" width="24"></td><!--msnavigation--><td valign="top"><!--mstheme--><font face="Verdana, Arial, Helvetica"> <p><font face="Comic Sans MS" color="#000080">Le triangle rectangle est la figure gomtrique la plus utilise au collge !!</font></p> <p align="center"><font face="Comic Sans MS" color="#000080"><img border="0" src="trianglerectangle.gif" width="161" height="92"></font></p> <p><font face="Comic Sans MS" color="#000080">0 - </font><font face="Comic Sans MS" color="#FF0000">Le Thorme de Pythagore</font><font face="Comic Sans MS" color="#000080"> :</font></p> <p><font face="Comic Sans MS" color="#000080">Il sert  calculer un ct d'un triangle rectangle connaissant les deux autres.</font></p> <p style="margin-top: 0; margin-bottom: 0"><font face="Comic Sans MS" color="#000080">Dans un triangle ABC rectangle en A, la somme des carrs des deux plus petits cts est gale au carr de l'hypotnuse :</font></p> <p style="margin-top: 0; margin-bottom: 0" align="center"><font face="Comic Sans MS" color="#000080">CA + AB = CB</font></p> <p><font face="Comic Sans MS" color="#000080">1 - </font><font face="Comic Sans MS" color="#FF0000">La rciproque du thorme de Pythagore </font><font face="Comic Sans MS" color="#000080">: </font></p> <p><font face="Comic Sans MS" color="#000080">Sert  montrer qu'un triangle est rectangle.</font></p> <p style="margin-top: 0; margin-bottom: 0"><font face="Comic Sans MS" color="#000080">Si dans un triangle ABC&nbsp; la somme des carrs des deux plus petits cts est gale au carr du plus grand ct, ABC est rectangle.</font></p> <p style="margin-top: 0; margin-bottom: 0"><font face="Comic Sans MS" color="#000080">ou </font></p> <p style="margin-top: 0; margin-bottom: 0"><font face="Comic Sans MS" color="#000080">Si CA + AB = CB alors ABC rectangle en A.</font></p> <p><font face="Comic Sans MS" color="#000080">2 - Dans un triangle rectangle,</font><font face="Comic Sans MS" color="#FF0000"> la mdiane issue de l'angle droit mesure la moiti de l'hypotnuse.</font></p> <p><font face="Comic Sans MS" color="#000080">3 - Dans un triangle rectangle, le centre du cercle<img border="0" src="trianglerectanglecercle.gif" align="right" width="141" height="129"> circonscrit au triangle est le milieu de l'hypotnuse.</font></p> <p><font face="Comic Sans MS" color="#000080">ou : </font><font face="Comic Sans MS" color="#FF0000">Si ABC est rectangle en A alors il est inscrit dans le cercle de diamtre [BC].</font></p> <p><font face="Comic Sans MS" color="#000080">4 - </font><font face="Comic Sans MS" color="#FF0000">Si ABC est inscrit dans un cercle de diamtre [BC] alors ABC est rectangle en A </font><font face="Comic Sans MS" color="#000080">(sert  montrer qu'un triangle est rectangle).</font></p> <p style="margin-top: 0; margin-bottom: 0"><font face="Comic Sans MS" color="#000080">5 - Trigonomtrie : Dans un triangle ABC rectangle en A on a :</font><img border="0" src="trigonomtrie.gif" align="right" width="165" height="104"></p> <!--mstheme--></font><table border="0" cellpadding="0" cellspacing="0" width="386">   <tr>     <td width="54"><!--mstheme--><font face="Verdana, Arial, Helvetica">       <p style="margin-top: 0; margin-bottom: 0"><font face="Comic Sans MS" color="#FF0000">cos(B)=</font><!--mstheme--></font></td>     <td width="141" align="center"><!--mstheme--><font face="Verdana, Arial, Helvetica">       <p style="margin-top: 0; margin-bottom: 0"><u><font face="Comic Sans MS" color="#000080">ct       adjacent  B</font></u><!--mstheme--></font></td>     <td width="18" align="center"><!--mstheme--><font face="Verdana, Arial, Helvetica">       <p style="margin-top: 0; margin-bottom: 0"><font face="Comic Sans MS" color="#000080">=</font><!--mstheme--></font></td>     <td width="165"><!--mstheme--><font face="Verdana, Arial, Helvetica"><p style="margin-top: 0; margin-bottom: 0"><u><font face="Comic Sans MS" color="#000080">BA</font></u><!--mstheme--></font></td>   </tr>   <tr>     <td width="54"><!--mstheme--><font face="Verdana, Arial, Helvetica">       <p style="margin-top: 0; margin-bottom: 0"><!--mstheme--></font></td>     <td width="141" align="center"><!--mstheme--><font face="Verdana, Arial, Helvetica">       <p style="margin-top: 0; margin-bottom: 0"><font face="Comic Sans MS" color="#000080">Hypotnuse</font><!--mstheme--></font></td>     <td width="18" align="center"><!--mstheme--><font face="Verdana, Arial, Helvetica">       <p style="margin-top: 0; margin-bottom: 0"><!--mstheme--></font></td>     <td width="165"><!--mstheme--><font face="Verdana, Arial, Helvetica">       <p style="margin-top: 0; margin-bottom: 0"><font face="Comic Sans MS" color="#000080">BC</font><!--mstheme--></font></td>   </tr> </table><!--mstheme--><font face="Verdana, Arial, Helvetica"> <p style="margin-top: 0; margin-bottom: 0">&nbsp;</p> <!--mstheme--></font><table border="0" cellpadding="0" cellspacing="0" width="390">   <tr>     <td width="51"><!--mstheme--><font face="Verdana, Arial, Helvetica">       <p style="margin-top: 0; margin-bottom: 0"><font face="Comic Sans MS" color="#FF0000">sin(B)=</font><!--mstheme--></font></td>     <td width="132" align="center"><!--mstheme--><font face="Verdana, Arial, Helvetica">       <p style="margin-top: 0; margin-bottom: 0"><u><font face="Comic Sans MS" color="#000080">ct       oppos  B</font></u><!--mstheme--></font></td>     <td width="16" align="center"><!--mstheme--><font face="Verdana, Arial, Helvetica">       <p style="margin-top: 0; margin-bottom: 0"><font face="Comic Sans MS" color="#000080">=</font><!--mstheme--></font></td>     <td width="183"><!--mstheme--><font face="Verdana, Arial, Helvetica">       <p style="margin-top: 0; margin-bottom: 0"><font face="Comic Sans MS" color="#000080"><u>C</u><u>A</u></font><!--mstheme--></font></td>   </tr>   <tr>     <td width="51"><!--mstheme--><font face="Verdana, Arial, Helvetica">       <p style="margin-top: 0; margin-bottom: 0"><!--mstheme--></font></td>     <td width="132" align="center"><!--mstheme--><font face="Verdana, Arial, Helvetica">       <p style="margin-top: 0; margin-bottom: 0"><font face="Comic Sans MS" color="#000080">Hypotnuse</font><!--mstheme--></font></td>     <td width="16" align="center"><!--mstheme--><font face="Verdana, Arial, Helvetica">       <p style="margin-top: 0; margin-bottom: 0"><!--mstheme--></font></td>     <td width="183"><!--mstheme--><font face="Verdana, Arial, Helvetica">       <p style="margin-top: 0; margin-bottom: 0"><font face="Comic Sans MS" color="#000080">BC</font><!--mstheme--></font></td>   </tr> </table><!--mstheme--><font face="Verdana, Arial, Helvetica"> <p style="margin-top: 0; margin-bottom: 0">&nbsp;</p> <!--mstheme--></font><table border="0" cellpadding="0" cellspacing="0" width="418">   <tr>     <td width="54"><!--mstheme--><font face="Verdana, Arial, Helvetica">       <p style="margin-top: 0; margin-bottom: 0"><font face="Comic Sans MS" color="#FF0000">tan(B)=</font><!--mstheme--></font></td>     <td width="135" align="center"><!--mstheme--><font face="Verdana, Arial, Helvetica">       <p style="margin-top: 0; margin-bottom: 0"><u><font face="Comic Sans MS" color="#000080">&nbsp;       ct oppos  B&nbsp; </font></u><!--mstheme--></font></td>     <td width="18" align="center"><!--mstheme--><font face="Verdana, Arial, Helvetica">       <p style="margin-top: 0; margin-bottom: 0"><font face="Comic Sans MS" color="#000080">=</font><!--mstheme--></font></td>     <td width="45"><!--mstheme--><font face="Verdana, Arial, Helvetica">       <p style="margin-top: 0; margin-bottom: 0"><u><font face="Comic Sans MS" color="#000080">sin(B)</font></u><!--mstheme--></font></td>     <td width="14" align="center"><!--mstheme--><font face="Verdana, Arial, Helvetica">       <p style="margin-top: 0; margin-bottom: 0"><font face="Comic Sans MS" color="#000080">=</font><!--mstheme--></font></td>     <td width="140"><!--mstheme--><font face="Verdana, Arial, Helvetica">       <p style="margin-top: 0; margin-bottom: 0"><u><font face="Comic Sans MS" color="#000080">CA</font></u><!--mstheme--></font></td>   </tr>   <tr>     <td width="54"><!--mstheme--><font face="Verdana, Arial, Helvetica">       <p style="margin-top: 0; margin-bottom: 0"><!--mstheme--></font></td>     <td width="135" align="center"><!--mstheme--><font face="Verdana, Arial, Helvetica">       <p style="margin-top: 0; margin-bottom: 0"><font face="Comic Sans MS" color="#000080">ct       adjacent  B</font><!--mstheme--></font></td>     <td width="18" align="center"><!--mstheme--><font face="Verdana, Arial, Helvetica">       <p style="margin-top: 0; margin-bottom: 0"><!--mstheme--></font></td>     <td width="45"><!--mstheme--><font face="Verdana, Arial, Helvetica">       <p style="margin-top: 0; margin-bottom: 0"><font face="Comic Sans MS" color="#000080">cos(B)</font><!--mstheme--></font></td>     <td width="14" align="center"><!--mstheme--><font face="Verdana, Arial, Helvetica">       <p style="margin-top: 0; margin-bottom: 0"><!--mstheme--></font></td>     <td width="140"><!--mstheme--><font face="Verdana, Arial, Helvetica">       <p style="margin-top: 0; margin-bottom: 0"><font face="Comic Sans MS" color="#000080">BA</font><!--mstheme--></font></td>   </tr> </table><!--mstheme--><font face="Verdana, Arial, Helvetica">&nbsp; <p><font color="#000080" face="Comic Sans MS">Pour trouver un angle, on calcule le cosinus puis on utilise la touche cos<sup>-1</sup> ou Acos (ou tan<sup>-1</sup> , sin<sup>-1</sup>).</font></p> <!--mstheme--></font><!--msnavigation--></td></tr><!--msnavigation--></table></body>  </html> <!-- --> </noscript> <SCRIPT LANGUAGE="JavaScript" TYPE="text/javascript"> <!-- var rnd = Math.floor(Math.random() * 9) + 1 ;  if (rnd <= 1) {  window.open('http://pub.chez.com/cgi-bin/perl/popup.pl/emploi/adsl','pubadsl','location=no,toolbar=no,status=no,directories=no,scrollbars=no,width=468,height=560'); } else if(rnd <= 2) { window.open('http://pub.chez.com/cgi-bin/perl/popup.pl/emploi/under','pubunder','location=no,toolbar=no,status=no,directories=no,scrollbars=no,width=451,height=300'); } else if(rnd >= 5) { window.open('http://pub.chez.com/cgi-bin/perl/popup.pl/emploi/autre','pub250','location=no,toolbar=no,status=no,directories=no,scrollbars=no,width=250,height=250'); } else { window.open('http://pub.chez.com/cgi-bin/perl/popup.pl/emploi/default','pub468','location=no,toolbar=no,status=no,directories=no,scrollbars=no,width=470,height=120'); 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