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Author:
acchu
GeoGebra
New Resources
圓的基本性質
正方形雪花图案
常见四边形是否是双心四边形
圓的切線方程
撒针估算面积实验
Discover Resources
季老师的数学实验室
線型函數圖形測驗
对多边形对角线、内角和、外角和的理解
平面直角坐标系的构成
跳棋棋盘
Discover Topics
Variance
Plane Figures or Shapes
Upper and Lower Sum or Riemann Sum
Confidence Interval
Equilateral Triangles