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Author:
Tsai, Dung Jung
GeoGebra
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撒针估算面积实验
龙形曲线-分形龙2
比較五件物件的重量
折扣
直線的斜率：水平變化 & 鉛垂變化
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Proof of Pythagoras Theorem(1) 畢氏定理的証明(1)
教學－棱柱摺紙樣式
angles sum of a triangle 1
Copy of Quiz on Solving Quadratic Inequalities 解二次不等式：測驗
圖5(動能分析)
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Mathematics
Similar Triangles
Cuboid
Quadrilaterals
Geometric Distribution