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蝴蝶定理（唐老师的课程）
Author:
龚洪萍
Topic:
Algebra
,
Geometry
GeoGebra
New Resources
兩位數除以一位數（二）
三位數除以一位數（一）
判斷球體
柱體建築師
找出對稱軸
Discover Resources
等積的正方形與正三角形
終點軌跡
中垂線
拋物線的平移
箭头平移
Discover Topics
Circle
Rational Numbers
Reflection
Cuboid
Secant Line or Secant