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angles sum on a striaght line
Author:
LAM YU SANG
GeoGebra
New Resources
三位數除以一位數（二）
找出對稱軸
直角坐標平面上的旋轉變換
算柱 (兩位數)
第八周作业
Discover Resources
過圓內一點與圓相切的圓
容積盒子(加蓋)
棒形圖(我最喜愛的科目)
旋轉圓弧
拋物線2--焦點法
Discover Topics
LCM and GCD
Incircle or Inscribed Circle
Equilateral Triangles
Linear Functions
Circumcircle or Circumscribed Circle