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Author:
GaryLee
GeoGebra
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画直线等分三角形的面积
畫出對稱圖形
球体的体积推导（优化版）
異分母分數減法
【案例】2013年安徽高考15题
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Apollonius Problem 10 CCC poncelet
從 12 面體、20 面體到 C60 C80
垂心
中國火柴遊戲二的副本
b站
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Histogram
Linear Programming or Linear Optimization
Random Experiments
Integral Calculus
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