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三圓外切
Author:
AlexWang
GeoGebra
New Resources
四邊形的特性
【案例】2013年安徽高考15题
三位數除以一位數（二）
算柱 (兩位數)
找出對稱軸
Discover Resources
equilateral triangle construction
Addition / Subtraction of 3 Directed Numbers
圓族
Graph of tangent
平行四邊形堆朵
Discover Topics
Geometric Mean
Intersection
Mode
Similarity Transformation or Similarity
Multiplication