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Author:
马云辉
GeoGebra
New Resources
拼砌四邊形
畫出對稱圖形
三位數除以一位數（二）
画直线等分三角形的面积
算柱 (兩位數)
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五角錐體
正四角錐
Kumamon
一次函数的引入
關燈遊戲 Lights Out Cube beta ver.
Discover Topics
Mode
Complex Numbers
Orthocenter
Quadrilaterals
Similarity Transformation or Similarity