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cycloid
Author:
劉瓊如
GeoGebra
New Resources
柱體建築師
兩位數除以一位數（二）
球體建築師
画直线等分三角形的面积
兩位數加法
Discover Resources
angle between planes
利用邊對摺找三角形的內心
Solid geometry
旁心
空间中两直线的位置关系
Discover Topics
Orthocenter
Inequalities
Planes
Terms
Ratios