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Author:
Ku, Yin Bon (Albert)
GeoGebra
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GeoGebra笔记功能体验课件
找出對稱軸
拼砌四邊形
四邊形的特性
兩位數除以一位數（二）
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文字工具：設定旋轉文字位置
阴影部分例子
國旗
验证勾股定理
S3 Ex4.3 Q01(3D圖)
Discover Topics
Unit Circle
Quadratic Functions
Root
Straight Lines
Circumcircle or Circumscribed Circle