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圓形變變變1(圓心不變，半徑改變)-學用
Author:
羅元甫
GeoGebra
New Resources
斜率的值
祖冲之的期望：内棋与外棋
【案例】2013年安徽高考15题
探究三角形的全等條件
圓周公式的應用
Discover Resources
柱體建築師
ex 3
包絡線
正方形和長方形有甚麼特性？
七巧板（tangram）的副本
Discover Topics
Linear Programming or Linear Optimization
Similarity Transformation or Similarity
Derivative
Cone
Natural Numbers