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桂群成
GeoGebra
New Resources
小学资源收集
龙形曲线-分形龙
椭圆内切圆链
龙形曲线-分形龙2
斐波那契螺旋弧线(表格法)
Discover Resources
图形
【三角函數】sinx的平移
Quiz on Centres of Triangles 三角形的中心:測驗
squence
拼出三角形的副本
Discover Topics
Pyramid
Line Segment
Sine
Equilateral Triangles
Coordinates