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Orthocentre

Author:uccke

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第八周作业
【案例】2018年全国1卷理科12题
兩組對邊相等和有直角的四邊形
直角坐標平面上的旋轉變換
兩位數加法

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Irregular shape
構造切線 / construct the tangent line
经纬度
園內接三角形
vertex

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Inequalities
Frequency Distribution
Upper and Lower Sum or Riemann Sum
Perimeter
Logarithm

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