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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
四邉形 (四年級) 教師版
球體建築師
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基測試題五邊形滾動
PMC 2014-15 Q2
點到直線的距離 8：觀察平行線常數項的差距
IMO2015D
旁心
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Subtraction
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