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Author:
Tse Sir
GeoGebra
New Resources
折扣
撒针估算面积实验
科赫雪花
常见四边形是否是双心四边形
平行線的判定
Discover Resources
趙庭浩的GGB電子書
九點圓
模拟龟兔画板
橢圓的副本
長方形的周界與長和闊的關係 (學生版)
Discover Topics
Real Numbers
Tangent Function
Statistics
Equations
Rotation