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椭圆的定义
Author:
guomenglin
Topic:
Ellipse
GeoGebra
New Resources
垂直線的斜率
龙形曲线-分形龙
祖冲之的期望：内棋与外棋
正方形雪花图案
第八周作业3
Discover Resources
畢式定理 (05)
sine graph 變換
circle
我的第一个绘本
正方形穿越
Discover Topics
Constructions
Variance
Root
Derivative
General Quadrilateral