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正N边形在圆内的滚动
Author:
孟宝兴
GeoGebra
New Resources
画直线等分三角形的面积
兩位數除以一位數（二）
畫出對稱圖形
兩位數加法
拼砌四邊形
Discover Resources
摩天輪
題F
More about Function
x^3+y^3-3xy
投擲兩枚硬幣的概率
Discover Topics
Cylinder
Planes
Confidence Interval
Addition
Angles