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三節棍
Author:
chen mingchuan
GeoGebra
New Resources
第八周作业
判斷球體
四邊形的特性
球体的体积推导（优化版）
画直线等分三角形的面积
Discover Resources
量度活動所用的時間 (時、分、秒)
Enneper's surface
判斷錐體 2
正多角錐(簡易)
圓系
Discover Topics
Cuboid
Indefinite Integral
Normal Distribution
Triangles
Arithmetic Operations