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拿破崙三角形
Author:
羅驥韡 (Pegasus Roe)
說明影片：
http://youtu.be/q9nxM2MYOVE
GeoGebra
New Resources
錐體建築師
畫出對稱圖形
【案例】圆柱体内放置一个大球六个小球
判斷球體
找出對稱軸
Discover Resources
正20面體展開
自學練習_兩位數乘三位數
根據百分率找數量（一）: 例4的副本
S3 Ch4.1 立體圖形(3D圖) - 十字形棱柱(ViewA)
多邊形的面積
Discover Topics
Division
General Quadrilateral
Trigonometry
Prism
Arithmetic Mean