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y=sin(x)
Author:
may
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未命名
有趣的梯形面積問題
Circle Area (By Peeling!)
程自顺102
程自顺100
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圓面積與圓周長
販賣部草圖
台球反射
reflection points
正弦函数图象
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Rotation
Hyberbola
Symmetry
Angles
Numbers
