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二元一次方程式2
Author:
丁于涵
GeoGebra
New Resources
兩位數加法
判斷球體
【案例】圆柱体内放置一个大球六个小球
兩組對邊相等和有直角的四邊形
三位數除以一位數（一）
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正五角椎
Copy of 閱讀鐘面及數字鐘（時和分）
IMO2014C
Rectangle
美麗的地球
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Diagrams
Prism
Median Value
Quadratic Equations
Similarity Transformation or Similarity