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錯角---垂直平行綫
Author:
chanfushun
GeoGebra
New Resources
三位數除以一位數（一）
兩組對邊相等和有直角的四邊形
找出對稱軸
【案例】2013年安徽高考15题
四邊形的特性
Discover Resources
Apollonius Problem 10 CCC wiki step 3
例題1【凹口性分析】
等高
数学几何
圓面積示範
Discover Topics
Plane Figures or Shapes
Trigonometric Functions
Arithmetic Operations
Limits
Interest Calculation