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史坦納圓鍊 (Steiner Chain)
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
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直線的斜率
兩位數除以一位數（二）
画直线等分三角形的面积
空间中两直线的位置关系
祖冲之的期望：内棋与外棋
Discover Resources
Construct a regular pentagon
周界
Locus (Non parallel lines) _a
對稱圖形
幂函数
Discover Topics
Numbers
Exponent
Mathematics
Trigonometry
Intersection