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同心圓+等分割線
Author:
許清惟
GeoGebra
New Resources
算柱 (兩位數)
兩組對邊相等和有直角的四邊形
四邊形的特性
【案例】2013年安徽高考15题
錐體建築師
Discover Resources
分數與小數
分蛋糕
紙幣
菱形
行程圖 (Travel Graph) 的複本
Discover Topics
Set Theory
Arithmetic Operations
Diagrams
Perimeter
Vectors 2D (Two-Dimensional)