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PMC 2014-15 Q4
Author:
Arthur Lee
圖中圓形的數目隨n的大小而改變。當n＝5，圖中應該有多小個圓？
GeoGebra
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拼砌四邊形
判斷球體
sanjiaohanshu
算柱 (兩位數)
三位數除以一位數（二）
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Sequence指令練習(二維2)
畢氏定理拼圖
勒洛三角形頂點A軌跡
Copy of 和差角公式几何证明
三角函数
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Median Value
Line Segment
Diagrams
Correlation
Normal Distribution