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平行四邊形與三角形
Author:
李春培
Topic:
Area
平行四邊形與三角形
GeoGebra
New Resources
三位數除以一位數（二）
算柱 (兩位數)
第八周作业
兩組對邊相等的四邊形
直角坐標平面上的旋轉變換
Discover Resources
線性規劃例6
拋物線
旋轉的概念
congruent triangles_provided by Mr Yeung Kar Chun
線的面化
Discover Topics
Pyramid
Centroid or Barycenter
Similar Triangles
Arithmetic
Rectangle