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同心圓
Author:
賴詩唐
GeoGebra
New Resources
圓的切線方程
探究三角形的全等條件
双心四边形
盈利與虧蝕
比較五件物件的重量
Discover Resources
製作組織圖
三角形面積與內切圓半徑
funny draw
反射(鉛垂線、水平線及斜線) Reflection (vertical line, horizontal line and line)
拋物線 (丹德林球)
Discover Topics
Statistics
Triangles
Continuity
Cosine
Incircle or Inscribed Circle