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正二十面體
Author:
侯杰材
正二十面體
GeoGebra
New Resources
平行線的斜率
直線的斜率：水平變化 & 鉛垂變化
讀磅
空间中两直线的位置关系
三角函数 的副本
Discover Resources
利用文字工具顯示計算結果
几何体
How to draw a decagon with ruler and compasses?
內外切圓性質
第二組-費馬點
Discover Topics
Complex Numbers
Sine
Means
Fractal Geometry
Mode