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Angle at Centre and Angle at circumference
Author:
Tsang Ka Chun
GeoGebra
New Resources
球体的体积推导（优化版）
三位數除以一位數（一）
四邊形的特性
兩組對邊相等的四邊形
兩位數加法
Discover Resources
量度活動所用的時間 (時、分、秒)
折紙畫橢圓
內外角平分線的副本
旋转的圆锥内接锥体.许兴华数学
Copy of 分數加法
Discover Topics
Linear Equations
Quadrilaterals
Diagrams
Congruence
Circumcircle or Circumscribed Circle