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第一組-垂心
Author:
mathguo
Topic:
Orthocenter
第一組-垂心
GeoGebra
New Resources
第八周作业
兩位數除以一位數（一）
画直线等分三角形的面积
畫出對稱圖形
GeoGebra笔记功能体验课件
Discover Resources
兩條數線比較(雙單位)
Solar System
三角形三內角和
Copy of 賺賠：例1
認識梯形的特徵
Discover Topics
Complex Numbers
Special Points
Division
Plane Figures or Shapes
Logic