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一线三等角
Author:
叶明杰
GeoGebra
New Resources
科氏力 (Coriolis Force)
盈利與虧蝕
斐波那契螺旋弧线（表格法-可动态调节）
第八周作业1
科赫雪花
Discover Resources
VV圓
Perigal's Dissection
Why same areas?
千年曆2
【物理】引力波
Discover Topics
Rotation
Cone
Inequalities
Quadrilaterals
Integers