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Author:
Leung Chun Kit
GeoGebra
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撒针估算面积实验
常见四边形是否是双心四边形
椭圆内切圆链
平行線的判定
活动三:应用性质
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觀察圖中有哪些角會相等
平面和正方體截痕
先估算,後看解釋
同心圓
擲兩個硬幣的機率分布
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Division
Quadrilaterals
Diagrams
Median Value
Parabola