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square & Triangle
Author:
Alex Leong
GeoGebra
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四邊形的特性
錐體建築師
球体的体积推导（优化版）
兩組對邊相等的四邊形
畫出對稱圖形
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GGBScript
双曲线的参数方程
椭圆的定义
向量與坐標
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Logic
Frequency Distribution
Ellipse
Dilation