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蝴蝶定理（唐老师的课程）
Author:
龚洪萍
Topic:
Algebra
,
Geometry
GeoGebra
New Resources
圓的基本性質
龙形曲线-分形龙2
常见四边形是否是双心四边形
直線的斜率
第八周作业3
Discover Resources
軌跡五、六︰移動點與兩直線保持相等距離(平行線/角平分線)
人教版必修I函数表示P21例5
學測指考
-3/2 ≤ cosα + cosβ + cosγ ≤ 3
指考試題
Discover Topics
Random Variables
Arithmetic
Square
Similarity Transformation or Similarity
Rhombus