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畢氏定理平移版
Author:
李政憲
GeoGebra
New Resources
畫出對稱圖形
兩組對邊相等和有直角的四邊形
三位數除以一位數（二）
兩組對邊相等的四邊形
拼砌四邊形
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利用頂點描述二次函數
Quiz on Conditions for Congruence of Triangles 全等三角形的判定條件：測驗
angle between lines
Copy of 部分佔全部的百分率: 例1
两角差的正切公式的证明
Discover Topics
Polygons
Arithmetic
Probability
Incircle or Inscribed Circle
Inequalities