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Author:
陳科旭
GeoGebra
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第八周作业
算柱 (兩位數)
【案例】2013年安徽高考15题
三位數除以一位數（二）
兩組對邊相等和有直角的四邊形
Discover Resources
Helicoid
圓與正三角形上動點連線上中點的軌跡
perimeter
Similar triangles reasons 2
酷狗音乐
Discover Topics
Statistical Characteristics
Logarithm
Incircle or Inscribed Circle
Area
Circle