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Copy of 周界
Author:
kennylau
,
spkwan
GeoGebra
modified by spkwan, uploaded 16 October 2011
New Resources
拼砌四邊形
算柱 (兩位數)
判斷球體
小数 的副本
兩位數除以一位數（一）
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三角形的四心 - 昱崧同學
冪函數
試繪
用面積逼近圓周率的副本
Addition and Subtraction of Directed Numbers (2)
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Histogram
Rotation
Cylinder
Cone
Ellipse