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任务8：一线三等角的相似模型
Author:
陈丽婷
GeoGebra
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双心四边形
比較五件物件的重量
撒针估算面积实验
折扣
龙形曲线-分形龙2
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方格紙上畫梯形3
圓周 (圖形I)
ex 9
Copy of 固定周界的長方形的面積變化
任意三棱锥的外接球
Discover Topics
Cuboid
Line Segment
Tangent Line or Tangent
Conic Sections
Statistical Characteristics