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Rectangle
Author:
Angela Yan
GeoGebra
New Resources
常见四边形是否是双心四边形
科赫雪花
龙形曲线-分形龙2
第八周作业
斐波那契螺旋弧线（表格法）
Discover Resources
正弦函数图像
空間中兩向量夾角
Area of a cricle by n-polygon
顶点在正方形对角线上的等腰三角形构成了一个等腰直角三角形
多边形旋
Discover Topics
Piecewise Functions
Quadrilaterals
Differential Calculus
Curve Sketching
Cylinder