Affine ratio: Difference between revisions

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Line 1: Line 1:
The more popular name seems to be ''simple ratio'', in German ''Teilverhältnis'':
:<math>
TV(p, q, t) := \lambda \in K \mbox{ such that } \vec{pt} = \lambda\cdot\vec{pq}
</math>
<jsxgraph width="500" height="500">
<jsxgraph width="500" height="500">
JXG.Options.label.autoPosition = true;
JXG.Options.label.autoPosition = true;
JXG.Options.text.useMathJax = true;
JXG.Options.text.fontSize = 24;
JXG.Options.text.fontSize = 24;


Line 8: Line 13:
var p = board.create('point', [-3,0], {name: 'p'});
var p = board.create('point', [-3,0], {name: 'p'});
var q = board.create('point', [3,0], {name: 'q'});
var q = board.create('point', [3,0], {name: 'q'});
var pq = board.create('segment', [p, q]);
var pq = board.create('line', [p, q]);
var t = board.create('glider', [-2, pq], {name: 't'});
var t = board.create('glider', [-2, 0, pq], {name: 't'});
var txt = board.create(text, [1, 2, function() { return "&lambda; =" + t.position.toFixed(2); }]);
var txt = board.create('text', [1, 2, function() { return "&lambda; = " + t.position.toFixed(2); }]);
</jsxgraph>
</jsxgraph>
=== The underlying JavaScript code ===
<source lang="javascript">
JXG.Options.label.autoPosition = true;
JXG.Options.text.fontSize = 24;
var board = JXG.JSXGraph.initBoard("jxgbox", {boundingbox: [-5,5,5,-5], showCopyright:false, showNavigation:false});
var p = board.create('point', [-3,0], {name: 'p'});
var q = board.create('point', [3,0], {name: 'q'});
var pq = board.create('line', [p, q]);
var t = board.create('glider', [-2, 0, pq], {name: 't'});
var txt = board.create('text', [1, 2, function() { return "&lambda; = " + t.position.toFixed(2); }]);
</source>


[[Category:Examples]]
[[Category:Examples]]
[[Category:Geometry]]
[[Category:Geometry]]

Latest revision as of 07:57, 4 May 2021

The more popular name seems to be simple ratio, in German Teilverhältnis:

[math]\displaystyle{ TV(p, q, t) := \lambda \in K \mbox{ such that } \vec{pt} = \lambda\cdot\vec{pq} }[/math]

The underlying JavaScript code

JXG.Options.label.autoPosition = true;
JXG.Options.text.fontSize = 24;

var board = JXG.JSXGraph.initBoard("jxgbox", {boundingbox: [-5,5,5,-5], showCopyright:false, showNavigation:false});

var p = board.create('point', [-3,0], {name: 'p'});
var q = board.create('point', [3,0], {name: 'q'});
var pq = board.create('line', [p, q]);
var t = board.create('glider', [-2, 0, pq], {name: 't'});
var txt = board.create('text', [1, 2, function() { return "&lambda; = " + t.position.toFixed(2); }]);