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Proof of Pythagoras Theorem(1) 畢氏定理的証明(1)
Author:
Alex CHIK
Topic:
Pythagoras or Pythagorean Theorem
GeoGebra
GeoGebra 互動數學教室
http://www.geogebra.hk
New Resources
畫出對稱圖形
四邊形的特性
兩組對邊相等和有直角的四邊形
【案例】2013年安徽高考15题
兩位數除以一位數（二）
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waaachen
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