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Author:
jessice
GeoGebra
New Resources
龙形曲线-分形龙
双心四边形
圓的切線方程
圓周公式的應用
祖冲之的期望：内棋与外棋
Discover Resources
九點圓 (9-Point Circle)
Liu Hui's Method of Finding π
相似三角形
-(√3/2)³ ≤ sinα sinβ sinγ ≤ (√3/2)³
用極座標做時鐘的副本