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圓心角

Author:范欣茹

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兩組對邊相等和有直角的四邊形
拼砌四邊形
【案例】2018年全国1卷理科12题
直角坐標平面上的旋轉變換
近似值：有效數字

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複數等比級數
商高定理2
Prism and Cylinder
等邊三角形
圓與切線

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Kite
Centroid or Barycenter
Real Numbers
Trapezoid
Fractal Geometry

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