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trapezium

Author:iedc

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四邊形的特性
找出對稱軸
兩位數除以一位數（一）
球體建築師
拼砌四邊形

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畢氏定理動態證明(歐基里得，應用時間參數跳躍函數)
動態文字2次函數
Locus (Segment)
螢橋國中鄭毅華
周界-平移法(教學練習一)

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Equilateral Triangles
Quadratic Functions
Right Triangles
Special Points
Incircle or Inscribed Circle

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