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2048小游戏
Author:
孟宝兴
GeoGebra
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兩位數加法
兩組對邊相等和有直角的四邊形
三位數除以一位數（二）
兩組對邊相等的四邊形
拼砌四邊形
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菱形有甚麼特性？
Sum of Exterior Angles of Polygons 多邊形外角和
籐編直線與曲線
Circle
三角形
Discover Topics
Parallelogram
Hyperbola
Percentages
Interest Calculation
Tangent Line or Tangent