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伍四红圆与正方形面积同周长比较

Author:小数点爱数学

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算柱 (兩位數)
直角坐標平面上的旋轉變換
畫出對稱圖形
兩組對邊相等和有直角的四邊形
画直线等分三角形的面积

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滾出直線之3
Yeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
定周长的正多边形面积变化规律（含圆）
等高
圆周长演示

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Tangent Function
Translation
Parabola
Plane Figures or Shapes
Exponential Functions

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