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例2 22.5 67.5
Author:
谢鹏
GeoGebra
New Resources
撒针估算面积实验
平行線的判定
第八周作业
折扣
三角函数 的副本
Discover Resources
軌跡七︰移動點與一點一線保持相等距離(拋物線)
艾雪鑲嵌2
夾擠單位圓的面積
test
疊代
Discover Topics
Vectors
Vectors 3D (Three-Dimensional)
Equations
Similar Triangles
Incircle or Inscribed Circle