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梯形有甚麼特性？
Author:
Anthony OR 柯志明
English version:
http://ggbtu.be/m79855
GeoGebra
New Resources
判斷球體
拼砌四邊形
四邉形 (四年級) 教師版
柱體建築師
算柱 (兩位數)
Discover Resources
Rotation 旋轉變換
黎曼和
polygon(first upload)
體積的量度 1
Trapezoid1
Discover Topics
Translation
Step Functions
Power Functions
Calculus
Centroid or Barycenter