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Author:
清綺楊
GeoGebra
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折扣
垂直線的斜率
比較五件物件的重量
龙形曲线-分形龙2
直線的斜率：水平變化 & 鉛垂變化
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Quiz on Addition and Subtraction of Directed Numbers (1) 有向數加減測驗(1)
一元二次不等式測驗
量角器2
Copy of 曲柄搖桿
矩形等距曲線
Discover Topics
Constructions
Root
Cone
Functions
Right Triangles