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正九邊形
Author:
李春培
正九邊形
GeoGebra
New Resources
錐體建築師
兩組對邊相等的四邊形
找出對稱軸
算柱 (兩位數)
三位數除以一位數（二）
Discover Resources
畫三角形 題2a
GeoGebra資料上傳
Ex5C#4
堆疊正立方體的副本
特殊四边形的转换
Discover Topics
Geometric Mean
Boxplot
Intersection
Function Graph
Logic