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外心

Author:吳淑惠

Topic:Constructions

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圓周公式的應用
漂亮的摇摆曲线
球体的体积推导
斜率的值
祖冲之的期望：内棋与外棋

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Angle between Line and Plane
包含除法（整數或分數 ÷ 分數）
circle
Copy of 分數與小數
讀磅 1（克）

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Statistical Characteristics
Quadrilaterals
Polygons
Surface
Arithmetic

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