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Author:
季阳天
GeoGebra
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祖冲之的期望：内棋与外棋
球体的体积推导
直線的斜率
圓周公式的應用
兩位數除以一位數（二）
Discover Resources
小二、小三_時間（學生版）
P.4 對稱
GGB6
单晨正方形在正六边形内部滚动的课件
Light reflected in ellipse
Discover Topics
Normal Distribution
Rational Numbers
Boxplot
Confidence Interval
Scalene Triangles