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翰林數學_2下_CH3-1_三角形的內角與外角
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翰林數學
GeoGebra
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三位數除以一位數（一）
GeoGebra笔记功能体验课件
小数 的副本
找出對稱軸
兩位數加法
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以面積固定平行線軌跡
拋射問題
B3_1-5_互動例6
探究余弦定理
均分除法（整數÷整數）的副本
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Rectangle
Cube
Complex Numbers
Rational Numbers
Vectors 2D (Two-Dimensional)