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Copy of 周界
Author:
kennylau
,
spkwan
GeoGebra
modified by spkwan, uploaded 16 October 2011
New Resources
兩位數除以一位數（二）
算柱 (兩位數)
找出對稱軸
異分母分數減法
錐體建築師
Discover Resources
test P1
Demo
離心率與圓錐曲線
圓的平移 連續版
NBA中国官网
Discover Topics
Cosine
Circumcircle or Circumscribed Circle
Intersection
Tree Diagrams
Polygons