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Projection
Author:
Jia-ming Shiu
Projection
GeoGebra
New Resources
【案例】2013年安徽高考15题
兩位數加法
【案例】圆柱体内放置一个大球六个小球
畫出對稱圖形
三位數除以一位數（二）
Discover Resources
全等三角形
Polygon Activity
初三作业
周界-平移法(練習二)
轴对称的两点的动画演示.许兴华数学
Discover Topics
Incircle or Inscribed Circle
Means
Continuity
Plane Figures or Shapes
Symmetry