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國旗
Author:
藍邦偉 Blue
GeoGebra
New Resources
四邊形的特性
柱體建築師
兩組對邊相等的四邊形
兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）
Discover Resources
內切圓半徑證明
加法運算
平行四邊形有甚麼特性？
中垂線性質
圓面積示範
Discover Topics
Inequalities
Combinatorics
Means
Stochastic Process or Random Process
Plane Figures or Shapes