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Author:
孟宝兴
GeoGebra
New Resources
兩位數除以一位數（一）
異分母分數減法
画直线等分三角形的面积
拼砌四邊形
【案例】圆柱体内放置一个大球六个小球
Discover Resources
二面角
謝爾賓斯基三角形(Sierpinsky)
三個交點
trigonometry
圓系
Discover Topics
Upper and Lower Sum or Riemann Sum
Circle
Pie Chart or Circle Chart
Linear Equations
Statistics