<iframe 
    src="https://jsxgraph.org/share/iframe/parallelogram" 
    style="border: 1px solid black; overflow: hidden; width: 550px; aspect-ratio: 55 / 65;" 
    name="JSXGraph example: Parallelogram" 
    allowfullscreen
></iframe>

<div id="board-0-wrapper" class="jxgbox-wrapper " style="width: 100%; ">
   <div id="board-0" class="jxgbox" style="aspect-ratio: 1 / 1; width: 100%;" data-ar="1 / 1"></div>
</div>

<script type = "text/javascript"> 
    /*
    This example is licensed under a 
    Creative Commons Attribution ShareAlike 4.0 International License.
    https://creativecommons.org/licenses/by-sa/4.0/
    
    Please note you have to mention 
    The Center of Mobile Learning with Digital Technology
    in the credits.
    */
    
    const BOARDID = 'board-0';

    JXG.Options.label.autoPosition = true;
    JXG.Options.text.useMathJax = true;
    JXG.Options.text.fontSize = 20;
    
    var board = JXG.JSXGraph.initBoard(BOARDID, {boundingbox: [-5,5,5,-5], keepaspectratio: true, showCopyright:false, showNavigation:false});
    
    var p = board.create('point', [-3,-3], {name:'\\(p\\)'});
    var q = board.create('point', [2, -3], {name:'\\(q\\)'});
    var s = board.create('point', [-1, 1], {name:'\\(s\\)'});
    var r = board.create('parallelpoint', [p, q, s], {name:'\\(r\\)'});
    
    var pq = board.create('arrow', [p, q], {withLabel: true, name:'\\(\\vec{pq}\\)', label:{position: 'top', parse: false}, lastArrow: {type: 4, size: 8}});
    var sr = board.create('arrow', [s, r], {withLabel: true, name:'\\(\\vec{sr}\\)', label:{position: 'top', parse: false}, lastArrow: {type: 4, size: 8}});
    var ps = board.create('arrow', [p, s], {withLabel: true, name:'\\(\\vec{ps}\\)', label:{position: 'top'}, lastArrow: {type: 4, size: 8}});
    var qr = board.create('arrow', [q, r], {withLabel: true, name:'\\(\\vec{qr}\\)', label:{position: 'top'}, lastArrow: {type: 4, size: 8}});
    
    var pr = board.create('arrow', [p, r], {});
 </script> 

<jsxgraph width="100%" aspect-ratio="1 / 1" title="Parallelogram" description="This construction was copied from JSXGraph examples database: BTW HERE SHOULD BE A GENERATED LINKuseGlobalJS="false">
   /*
   This example is licensed under a 
   Creative Commons Attribution ShareAlike 4.0 International License.
   https://creativecommons.org/licenses/by-sa/4.0/
   
   Please note you have to mention 
   The Center of Mobile Learning with Digital Technology
   in the credits.
   */
   
   JXG.Options.label.autoPosition = true;
   JXG.Options.text.useMathJax = true;
   JXG.Options.text.fontSize = 20;
   
   var board = JXG.JSXGraph.initBoard(BOARDID, {boundingbox: [-5,5,5,-5], keepaspectratio: true, showCopyright:false, showNavigation:false});
   
   var p = board.create('point', [-3,-3], {name:'\\(p\\)'});
   var q = board.create('point', [2, -3], {name:'\\(q\\)'});
   var s = board.create('point', [-1, 1], {name:'\\(s\\)'});
   var r = board.create('parallelpoint', [p, q, s], {name:'\\(r\\)'});
   
   var pq = board.create('arrow', [p, q], {withLabel: true, name:'\\(\\vec{pq}\\)', label:{position: 'top', parse: false}, lastArrow: {type: 4, size: 8}});
   var sr = board.create('arrow', [s, r], {withLabel: true, name:'\\(\\vec{sr}\\)', label:{position: 'top', parse: false}, lastArrow: {type: 4, size: 8}});
   var ps = board.create('arrow', [p, s], {withLabel: true, name:'\\(\\vec{ps}\\)', label:{position: 'top'}, lastArrow: {type: 4, size: 8}});
   var qr = board.create('arrow', [q, r], {withLabel: true, name:'\\(\\vec{qr}\\)', label:{position: 'top'}, lastArrow: {type: 4, size: 8}});
   
   var pr = board.create('arrow', [p, r], {});
</jsxgraph>