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坐標測量
Author:
chanfushun
GeoGebra
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科氏力 (Coriolis Force)
斐波那契螺旋弧线（表格法）
三角函数 的副本
双心四边形
龙形曲线-分形龙2
Discover Resources
Perigal's Dissection
二元一次方程式2
凹透镜
旋转多边形
六上：圆的面积公式推导
Discover Topics
Function Graph
Perimeter
Angles
Constructions
Cosine