$\definecolor{red}{RGB}{255,0,0}$$\definecolor{black}{RGB}{0,0,0}$
  1. a
  2. a
  3. a
    • a2  =   4·h 2  / 3
    • a2  =   3·H2 / 2
    • a6  =   72·V2
    • a4  =   16·A2 / 3
  1. H
  2. H
  3. H
    • H2  =   2·a2 / 3
  1. h
  2. h
  3. h
    • h2  =   3·a2 / 4
    • h2  =   9·H2 / 8
  1. A
  2. A
  3. A
    • A2  =   3·a4 / 16
  1. V
  2. V
  3. V
    • V2  =   a6/ 72
Pyramid with triangular base (Tetrahedron): base, lateral area, heights, volume </ title><meta name = "keywords" content = "Pyramid with triangular base (Tetrahedron), base, lateral area, heights, volume" /><meta property = "og: title" content = "Pyramid with triangular base (tetrahedron): base, lateral area, heights, volume" /><meta property = "og: description" content = "Relationship between base, lateral area, heights, volume of triangular-based pyramid (tetrahedron):" /><meta name = "description" content = "Relationship between base, lateral area, heights, volume of the triangular-based pyramid (tetrahedron)" /> <script language="JavaScript"> var i = 0; var path = new Array(); function myformula(j) { formula="<p class='midspaced'>"; actualj=j; var letab = document.getElementsByTagName("table").length; var tab = document.getElementsByTagName("table")[j]; var my = tab.rows[0]; var lmy = my.cells.length; slctarr[j]=new Array(); for (i=0; i<lmy; i++){ var mytd0 = my.cells[i]; var x=mytd0.children[0]; var x0=x.children[0]; slctarr[j][i]=x0.innerHTML; var c = x.children; var le = c.length; formula+="<br /><br /><a href='javascript:choice("+i+","+j+")'>"+x0.innerHTML+"</a>"; } formula+="</p>"; document.getElementById("demo").innerHTML = formula; document.getElementById("showformula").style.display="block"; document.getElementById("demo2").style.display= "none"; } </script> </head> <body> <p class="midcentered"> <img class="bild" name="tete" src="frise.jpg" /> <a href="http://www.chim.lu/formules/index-fr.html" style="color:red;font-size:110%">→    Retour à la liste complète des formules</a> <div style="border-style: double; border-color: gray;"><p class="midcentered"><a href="https://www.unitjuggler.com/index-fr.html" /><img src="unitjuggler.png"></a></p> <script type="text/x-mathjax-config"> MathJax.Hub.Config({ tex2jax: {inlineMath: [["$","$"]]} }); MathJax.Hub.Config({ TeX: { extensions: ["color.js"]} }); MathJax.Hub.Config({ "HTML-CSS": { linebreaks: { automatic: true } }, SVG: { linebreaks: { automatic: true } } }); </script> <script type="text/javascript" src="../js/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script> <p id="show" class="midcentered"> <img class="bild" name="slide" src="pyramide2.png" /> </p> <div id="calcformula" style="display:none"> <p id="demo2" class="midcentered" style="font-size:100%;"></p> </div> <div id="showformula" style="display:none"> <p id="demo" class="midcentered" style="font-size:75%;"></p> </div> <div class="aid" id="showreminder" style="display:none" > <img src="../pic/close.gif" style="float: right; margin: 0px 0px 15px 15px;" onClick=tutback3()> <p id="demo3" class="midspaced" style="font-size:100%;"></p> </div> <p id="quantities" class="midspaced" style="font-size:150%;"></p> <p id="buttonim" class="midspaced" style="display:none"> <img src="tri24.png" onclick="javascript: montreimage()" /> <img src="tri23.png" onclick="javascript: cacheimage()" /> </p> <script> function montreimage(){ document.getElementById("show").style.display="block"; } function cacheimage() { document.getElementById("show").style.display="none"; } function tutback3(){ document.getElementById("showreminder").style.display="none"; } function tutback4(){ document.getElementById("showformula").style.display="none"; } </script> <script> function montreimage(){ document.getElementById("show").style.display="block"; } function cacheimage() { document.getElementById("show").style.display="none"; } function tutback(){ document.location.href="http://chim.lu/formules/fr0021.php"; document.getElementById("showformula").style.display="none"; } function tutback2(){ document.getElementById("calcformula").style.display="none"; } function tutback3(){ document.getElementById("showreminder").style.display="none"; } function tutback4(){ document.getElementById("showformula").style.display="none"; } function choice(p,q){ document.getElementById("demo2").innerHTML = ""; v=0; inq2+="<input style='display:none' name='nombre1' value='"+p+"'/>";inq2+="<input style='display:none' name='nombre2' value='"+q+"'/>"; if((q==0)&&(p==0)){nbr=1; doSomething(2); }; if((q==0)&&(p==1)){nbr=1; doSomething(1); }; if((q==0)&&(p==2)){nbr=1; doSomething(4); }; if((q==0)&&(p==3)){nbr=1; doSomething(3); }; if((q==1)&&(p==0)){nbr=1; doSomething(0); }; if((q==2)&&(p==0)){nbr=1; doSomething(0); }; if((q==2)&&(p==1)){nbr=1; doSomething(1); }; if((q==3)&&(p==0)){nbr=1; doSomething(0); }; if((q==4)&&(p==0)){nbr=1; doSomething(0); }; tutback4(); } // Input inq2="<form action='fr0021_out.php' method='post'>"; inq2+="<div class='midspaced'><table style='width:100%' >" reserve=inq2; function doSomething(r){ v++; var qt = document.getElementsByTagName("ol")[r]; var y1=qt.children[2]; var t1=y1.innerHTML; var y2=qt.children[1]; var t2="n[]"; inq2+="<tr><td>"; inq2+="<span style='text-align:left; font-size:200%; color: blue; float:left; width:15%'>"+ y2.innerHTML+ "</span><input style='float:left; font-size:200%; width: 60%;' type='text' name="+t2+"><span style='text-align:left; float:left; width:20%' class='mjxi'>      "+t1+"</span> "; inq2+="</td></tr>"; if (v==nbr){inq2+="<tr><td><button type='submit' name='formSubmit' value='Submit' /><img src='tri22.png' /></button></td></tr></table></div>"; document.getElementById("demo2").innerHTML = inq2; document.getElementById("demo2").style.display= "block"; document.getElementById("calcformula").style.display="block"; inq2=reserve;} } // Quantités initiales à cliquer function displayquantities(){ inq="<p class='midlarge'>"; var leqt = document.getElementsByTagName("ol").length; slctarr=new Array(leqt); for (j=0; j<leqt; j++){ var qt = document.getElementsByTagName("ol")[j]; var y1=qt.children[0]; var y2=qt.children[1]; inq+="<span style='font-size:125%' onClick=myformula("+j+")><span style='color:blue'> →</span> "+ y1.innerHTML + "</span>   "; } inq+="</p>"; document.getElementById("quantities").innerHTML = inq; } displayquantities(); if(""!="") { document.getElementById('buttonim').style.display='block'; document.getElementById('showreminder').style.display='block';document.getElementById('show').style.display='none'; document.getElementById("demo3").innerHTML="<span style='font-size:150%; color:green'><span>"; prepare() ;}; </script> </div> </p> </html> </html>