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two-example

Author:知己

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兩組對邊相等和有直角的四邊形
四邊形的特性
兩組對邊相等的四邊形
拼砌四邊形
【案例】2013年安徽高考15题

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二次函数最值问题
向量点乘
vertex of quadratic function
F2 cylinder (r vs TSA)
二倍角公式證明

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Quadrilaterals
Upper and Lower Sum or Riemann Sum
Rational Numbers
Addition
Trigonometry

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