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GeoGebra
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多邊形的面積
正方形雪花图案
垂直線的斜率
祖冲之的期望：内棋与外棋
龙形曲线-分形龙
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認識分數
固定周界的矩形
平面区域的理解
纏繞圖-五邊形
分苹果除法
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Logic
Boxplot
General Quadrilateral
Hypergeometric Distribution
Isosceles Triangles