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最小周長
Author:
張丰耘
GeoGebra
New Resources
直角坐標平面上的旋轉變換
兩位數除以一位數（一）
【案例】2013年安徽高考15题
錐體建築師
兩位數除以一位數（二）
Discover Resources
Quiz on Addition and Subtraction of Directed Numbers (2) 有向數加減測驗(2)
題二
Scatter diagram(散點圖)
等弧對等角
比較角的大小(直接比較)
Discover Topics
Orthocenter
Constructions
Symmetry
Set Theory
Stochastic Process or Random Process