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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
兩組對邊相等和有直角的四邊形
柱體建築師
第八周作业
拼砌四邊形
球体的体积推导（优化版）
Discover Resources
偽國中數學幾何題
glt-c02-00 長方體
日照图
三棱锥的三视图的副本
圓的面積的副本
Discover Topics
Root
Surface
Real Numbers
Matrices
Tangent Line or Tangent