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Author:iedc

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拼砌四邊形
兩組對邊相等的四邊形
兩組對邊相等和有直角的四邊形
【案例】2018年全国1卷理科12题
画直线等分三角形的面积

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指數與對數的對稱性
Pyramid and Cone 2
向量的分解（非垂直）
藝術之美 (1)
找出對稱軸

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Trigonometric Functions
Similar Triangles
Addition
Cube
Coordinates

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