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GeoGebra
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常见四边形是否是双心四边形
龙形曲线-分形龙2
撒针估算面积实验
双心四边形
第八周作业1
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補角關係
雙曲線20160521
DSE Circle-ACT01D Distance of Chords and Centre of a Circle
八角柱(可側轉、上下轉)
Copy of 固定周界的長方形的面積變化
Discover Topics
Straight Lines
Solids or 3D Shapes
Pyramid
Circumcircle or Circumscribed Circle
Reflection