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parallelogram
Author:
Ku, Yin Bon (Albert)
GeoGebra
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漂亮的摇摆曲线
科氏力 (Coriolis Force)
常见四边形是否是双心四边形
祖冲之的期望：内棋与外棋
讀磅
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王宏銘Proof93
perimeter
Copy of 固定周界的長方形的面積變化
量詞
假的龍珠
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Means
Perimeter
Real Numbers
Cosine