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外凸的正方形
Author:
王娟
GeoGebra
New Resources
折扣
科赫雪花
平行線的判定
中华人民共和国国旗
常见四边形是否是双心四边形
Discover Resources
Slope 斜率 - 概念及定義 (3)
椭圆与圆的关系
圆锥曲线定义的拓展(卡西尼卵形线)
正五角柱
Drag the red dots, see the area ratio of EHFG to ABCD
Discover Topics
Linear Functions
Definite Integral
Rectangle
Correlation
Coordinates