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祖冲之的期望：内棋与外棋
Author:
孟宝兴
GeoGebra
New Resources
拼砌四邊形
【案例】圆柱体内放置一个大球六个小球
三位數除以一位數（一）
三位數除以一位數（二）
判斷球體
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四邊形內多個四邊型旋轉
y=sinx+1,y=2sinx,y=sin2x的圖形
整數點
圓與切線
两个经典不等式
Discover Topics
Straight Lines
Arithmetic Operations
Statistical Characteristics
Unit Circle
Centroid or Barycenter