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平行四邊形有甚麼特性？
Author:
Anthony OR 柯志明
Topic:
Parallelogram
English version:
http://ggbtu.be/m79826
GeoGebra
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【案例】2013年安徽高考15题
兩組對邊相等和有直角的四邊形
判斷球體
小数 的副本
異分母分數減法
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北區模考非選第二題 (2014.03.06)
Task 8
测试 = =
構作對稱圖形
circular motion
Discover Topics
Subtraction
Algebra
Dilation
Division
Similarity Transformation or Similarity