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拋物面的光學性質

Author:宋政蒲

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拼砌四邊形
兩組對邊相等和有直角的四邊形
【案例】2013年安徽高考15题
兩組對邊相等的四邊形
第八周作业

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教學－旋轉
學測指考題
時鐘
三角形点阵
正方形纸片剪出正三角形（顶点在边上）

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Cuboid
Prism
Parallelogram
Line Segment
Intersection

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