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Author:
Jimmy Ma
GeoGebra
New Resources
撒针估算面积实验
斐波那契螺旋弧线（表格法）
中华人民共和国国旗
折扣
三角函数 的副本
Discover Resources
風車2
Angle Sum of Pentagon (SWC)
proof*5 張華炘
斜率
二元一次不等式的解
Discover Topics
Parallelogram
Congruence
Geometric Transformations
Integral Calculus
Polygons