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Author:
张书真
GeoGebra
New Resources
双心四边形
折扣
圓的切線方程
百分數及其應用
科赫雪花
Discover Resources
Apollonius Problem 10 CCC wiki step 5
GeoGebra与数学教育论坛通知
扇形動畫
一次函数图像
直线和圆的位置关系
Discover Topics
Arithmetic
Vectors
Dilation
Means
Tangent Line or Tangent