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垂心旁心
Author:
ceodee
GeoGebra
New Resources
平行線的判定
第三周作业效果演示
活动三:应用性质
常见四边形是否是双心四边形
撒针估算面积实验
Discover Resources
偏導數、切平面、梯度
新疆八卦城
semops_圓錐
仙后座找北極星1
立體旋轉卡片
Discover Topics
Prism
Plane Figures or Shapes
Sine
Special Points
Similar Triangles