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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
三位數除以一位數（二）
兩組對邊相等的四邊形
三位數除以一位數（一）
算柱 (兩位數)
球体的体积推导（优化版）
Discover Resources
Construct a regular pentagon
模擬「分頁」效果
方格紙
horizontal
賺賠：例1的副本
Discover Topics
Orthocenter
Cube
Parabola
Similarity Transformation or Similarity
Random Experiments