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Author:
Tsang Kin Fun Francis
GeoGebra
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平行線的斜率
三角函数 的副本
祖冲之的期望：内棋与外棋
直線的斜率：水平變化 & 鉛垂變化
撒针估算面积实验
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Cross sections of cube
二元一次不等式-極大值極小值
數學傳播39卷4期, 平面幾何公式思考
Testing
One less prime number
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Planes
Rotation
Root
Linear Equations
Frequency Distribution