Difference between revisions of "Five Circle Theorem"

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(2 intermediate revisions by the same user not shown)
Line 14: Line 14:
  
 
for (k=0;k<5;k++) {
 
for (k=0;k<5;k++) {
   i[k] = brd.create('point',[JXG.Math.Geometry.intersection(l[k],l[(k+2)%5],0)],{name:'',strokeColor:'#EAEA00',fillColor:'#EAEA00'});
+
   i[k] = brd.create('intersection',[l[k],l[(k+2)%5],0],{name:'',strokeColor:'#EAEA00',fillColor:'#EAEA00'});
 
}
 
}
  
Line 21: Line 21:
 
}
 
}
 
for (k=0;k<5;k++) {
 
for (k=0;k<5;k++) {
   j[k] = brd.create('point',[JXG.Math.Geometry.intersection(c[k],c[(k+2)%5],0)],{name:'',strokeColor:'#EA0000',fillColor:'#EA0000'});
+
   j[k] = brd.create('intersection',[c[k],c[(k+2)%5],0],{name:'',strokeColor:'#EA0000',fillColor:'#EA0000'});
 
}
 
}
  
Line 45: Line 45:
  
 
for (k=0;k<5;k++) {
 
for (k=0;k<5;k++) {
   i[k] = brd.create('point',[brd.intersection(l[k],l[(k+2)%5],0)],{name:'',strokeColor:'#EAEA00',fillColor:'#EAEA00'});
+
   i[k] = brd.create('intersection',[l[k],l[(k+2)%5],0],{name:'',strokeColor:'#EAEA00',fillColor:'#EAEA00'});
 
}
 
}
  
Line 52: Line 52:
 
}
 
}
 
for (k=0;k<5;k++) {
 
for (k=0;k<5;k++) {
   j[k] = brd.create('point',[brd.intersection(c[k],c[(k+2)%5],0)],{name:'',strokeColor:'#EA0000',fillColor:'#EA0000'});
+
   j[k] = brd.create('intersection',[c[k],c[(k+2)%5],0],{name:'',strokeColor:'#EA0000',fillColor:'#EA0000'});
 
}
 
}
  

Latest revision as of 17:10, 20 February 2013

The underlying JavaScript code

var brd = JXG.JSXGraph.initBoard('jxgbox',{boundingbox:[-5,5,5,-5]});
var p = [], l = [], i = [], c = [], j = [], k;

p[0] = brd.create('point',[-2.5,-3],{name:'',strokeColor:'#7355ff',fillColor:'#7355ff'});
p[1] = brd.create('point',[-0,4],{name:'',strokeColor:'#7355ff',fillColor:'#7355ff'});
p[2] = brd.create('point',[2.5,-3],{name:'',strokeColor:'#7355ff',fillColor:'#7355ff'});
p[3] = brd.create('point',[-4,0],{name:'',strokeColor:'#7355ff',fillColor:'#7355ff'});
p[4] = brd.create('point',[4,0],{name:'',strokeColor:'#7355ff',fillColor:'#7355ff'});

for (k=0;k<5;k++) {
   l[k] = brd.create('segment',[p[k],p[(k+1)%5]],{strokeColor:'black',strokeWidth:1});
}

for (k=0;k<5;k++) {
   i[k] = brd.create('intersection',[l[k],l[(k+2)%5],0],{name:'',strokeColor:'#EAEA00',fillColor:'#EAEA00'});
}

for (k=0;k<5;k++) {
   c[k] = brd.create('circumcircle',[p[k],i[k],i[(k+2)%5]],{strokeColor:'gray', strokeWidth:1, point: {visible: false}});
}
for (k=0;k<5;k++) {
   j[k] = brd.create('intersection',[c[k],c[(k+2)%5],0],{name:'',strokeColor:'#EA0000',fillColor:'#EA0000'});
}

cc = brd.create('circumcircle',[j[0],j[2],j[3]],{strokeColor:'red',strokeWidth:2,point:{strokeColor:'#000000',fillColor:'#000000',size:1}});
brd.update();