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The Isogonic Center
Author:
代国兴
GeoGebra
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龙形曲线-分形龙
常见四边形是否是双心四边形
第八周作业1
比較五件物件的重量
龙形曲线-分形龙2
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上和與下和
分數均分
重心性質
圓錐截痕模型
探究三角形的全等條件
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Isosceles Triangles
Function Graph
Cylinder
Arithmetic Operations
Right Triangles