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waaachen
Author:
陳兪宏
waaachen
GeoGebra
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兩位數加法
三位數除以一位數（二）
兩組對邊相等的四邊形
拼砌四邊形
GeoGebra笔记功能体验课件
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二次函數圖形的描繪
橢圓軌跡加滑桿
轉動的水箱
余弦定理的证明
展開圓面積 (講義版)的副本
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Trigonometry
Pyramid
Incircle or Inscribed Circle
Orthocenter
Optimization Problems