Difference between revisions of "Two reflections I (parallel lines)"
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<source lang="javascript"> | <source lang="javascript"> | ||
+ | var board = JXG.JSXGraph.initBoard('box', {boundingbox: [-5, 5, 5, -5], keepaspectratio:true}), | ||
+ | A = board.create('point', [-2, -2], {withLabel:false}), | ||
+ | B = board.create('point', [3, -4], {withLabel:false}), | ||
+ | C = board.create('point', [-2, 2], {withLabel:false}), | ||
+ | s = board.create('line',[A,B], {name:'s', withLabel:true}), | ||
+ | t = board.create('parallel',[s,C], {name:'t', withLabel:true}), | ||
+ | |||
+ | Ss = board.create('transform', [s], {type:'reflect'}), | ||
+ | St = board.create('transform', [t], {type:'reflect'}), | ||
+ | |||
+ | P1 = board.create('point', [0,-3], {name:'P_1', color:'green', size:8}), | ||
+ | P2 = board.create('point', [P1, Ss], {name:'P_2', color:'green'}), | ||
+ | P3 = board.create('point', [P2, St], {name:'P_3', color:'green'}), | ||
+ | |||
+ | Q1 = board.create('point', [1,-4], {name:'Q_1', color:'blue', size:8}), | ||
+ | Q2 = board.create('point', [Q1, Ss], {name:'Q_2', color:'blue'}), | ||
+ | Q3 = board.create('point', [Q2, St], {name:'Q_3', color:'blue'}), | ||
+ | |||
+ | l1 = board.create('line',[P1,Q1], {color:'black', strokeWidth:1, dash:2}), | ||
+ | l2 = board.create('line',[P2,Q2], {color:'black', strokeWidth:1, dash:2}), | ||
+ | l3 = board.create('line',[P3,Q3], {color:'black', strokeWidth:1, dash:2}), | ||
+ | |||
+ | g1 = board.create('segment',[P1,P2], {color:'orange', strokeWidth:1, dash:3}), | ||
+ | g2 = board.create('segment',[P2,P3], {color:'orange', strokeWidth:1, dash:3}), | ||
+ | h1 = board.create('segment',[Q1,Q2], {color:'orange', strokeWidth:1, dash:3}), | ||
+ | h2 = board.create('segment',[Q2,Q3], {color:'orange', strokeWidth:1, dash:3}); | ||
</source> | </source> | ||
[[Category:Examples]] | [[Category:Examples]] | ||
[[Category:Geometry]] | [[Category:Geometry]] |
Latest revision as of 18:10, 24 June 2020
The JavaScript code
var board = JXG.JSXGraph.initBoard('box', {boundingbox: [-5, 5, 5, -5], keepaspectratio:true}),
A = board.create('point', [-2, -2], {withLabel:false}),
B = board.create('point', [3, -4], {withLabel:false}),
C = board.create('point', [-2, 2], {withLabel:false}),
s = board.create('line',[A,B], {name:'s', withLabel:true}),
t = board.create('parallel',[s,C], {name:'t', withLabel:true}),
Ss = board.create('transform', [s], {type:'reflect'}),
St = board.create('transform', [t], {type:'reflect'}),
P1 = board.create('point', [0,-3], {name:'P_1', color:'green', size:8}),
P2 = board.create('point', [P1, Ss], {name:'P_2', color:'green'}),
P3 = board.create('point', [P2, St], {name:'P_3', color:'green'}),
Q1 = board.create('point', [1,-4], {name:'Q_1', color:'blue', size:8}),
Q2 = board.create('point', [Q1, Ss], {name:'Q_2', color:'blue'}),
Q3 = board.create('point', [Q2, St], {name:'Q_3', color:'blue'}),
l1 = board.create('line',[P1,Q1], {color:'black', strokeWidth:1, dash:2}),
l2 = board.create('line',[P2,Q2], {color:'black', strokeWidth:1, dash:2}),
l3 = board.create('line',[P3,Q3], {color:'black', strokeWidth:1, dash:2}),
g1 = board.create('segment',[P1,P2], {color:'orange', strokeWidth:1, dash:3}),
g2 = board.create('segment',[P2,P3], {color:'orange', strokeWidth:1, dash:3}),
h1 = board.create('segment',[Q1,Q2], {color:'orange', strokeWidth:1, dash:3}),
h2 = board.create('segment',[Q2,Q3], {color:'orange', strokeWidth:1, dash:3});