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trapezium

Author:iedc

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拼砌四邊形
【案例】2013年安徽高考15题
兩組對邊相等的四邊形
兩組對邊相等和有直角的四邊形
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柱體建築師 2
圆的面积 - 排列组合法
空間向量座標
極落戰艦-敵軍環伺　極座標遊戲
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Logarithmic Functions
Optimization Problems
Mathematics
Circumcircle or Circumscribed Circle
Angles

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