Difference between revisions of "Three touching circles"

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Line 5: Line 5:
 
     C  = brd.create('point', [1,2]),
 
     C  = brd.create('point', [1,2]),
  
     a1 = brd.create('segment', [A,B], {name:'a1', withLabel:true, label:{position'top'} }),
+
     a1 = brd.create('segment', [A,B], {name:'a1', withLabel:true, label:{position:'top'} }),
 
     a2 = brd.create('segment', [B,C], {name:'a2', withLabel:true}),
 
     a2 = brd.create('segment', [B,C], {name:'a2', withLabel:true}),
 
     a3 = brd.create('segment', [C,A], {name:'a3', withLabel:true}),
 
     a3 = brd.create('segment', [C,A], {name:'a3', withLabel:true}),

Revision as of 13:38, 20 September 2012

The underlying JavaScript code

var brd = JXG.JSXGraph.initBoard('jxgbox', {boundingbox:[-2,5,5,-2]});
var A  = brd.create('point', [0,0]),
    B  = brd.create('point', [2,0]),
    C  = brd.create('point', [1,2]),

    a1 = brd.create('segment', [A,B], {name:'a1', withLabel:true}),
    a2 = brd.create('segment', [B,C], {name:'a2', withLabel:true}),
    a3 = brd.create('segment', [C,A], {name:'a3', withLabel:true}),
    c1 = brd.create('circle', 
            [A, 
             function(){ var r1 = (C.Dist(A)-B.Dist(C)+A.Dist(B))/2.0;
                        return r1; }
            ]);
    c2 = brd.create('circle', 
            [B, 
             function(){ return A.Dist(B)-c1.Radius(); }
            ]);
    c3 = brd.create('circle', 
            [C, 
             function(){ return B.Dist(C)-c2.Radius(); }
            ]);