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  • 兩組對邊相等和有直角的四邊形
  • 畫出對稱圖形
  • 【案例】2018年全国1卷理科12题
  • 【案例】2013年安徽高考15题
  • 兩位數除以一位數(二)

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  • 圓內接四邊形 ABCD ...,求 sinθ=?
  • 凹面鏡成像
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  • test
  • 多物件逐一動畫

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  • Sequences and Series
  • Set Theory
  • Vectors 3D (Three-Dimensional)
  • Statistics
  • Scalene Triangles
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