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Author:
lee chao ming
GeoGebra
New Resources
拼砌四邊形
sanjiaohanshu
兩位數除以一位數（一）
異分母分數減法
四邊形的特性
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旋轉對稱_1_李樂雯
橢圓
example 3
拋物線5--包絡線法
黎曼和的副本
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Translation
Linear Functions
Linear Regression
Statistics
Plane Figures or Shapes