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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
找出對稱軸
畫出對稱圖形
兩組對邊相等和有直角的四邊形
第八周作业
【案例】2018年全国1卷理科12题
Discover Resources
平面幾何
龍騰4_1-1講段8
Activity 3
切割柏拉圖多面體
平行線法
Discover Topics
Congruence
Centroid or Barycenter
Boxplot
Matrices
Trigonometry