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勾股定理的证明——弦图面积平移法
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方程
GeoGebra
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平行線的判定
异形操场
龙形曲线-分形龙
比較五件物件的重量
椭圆内切圆链
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陳人瑜proof81
test
奠基1
求兩斜線區域的差
圓周角與圓心角之度數關係臆測(圓心在圓周角的外部)
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Angles
Optimization Problems
Prism
Differential Calculus
Percentages