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正方形中的45度摺紙

Author:鍾元杰

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錐體建築師
【案例】圆柱体内放置一个大球六个小球
兩組對邊相等和有直角的四邊形
拼砌四邊形
【案例】2013年安徽高考15题

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Floor plan area
Angle at Centre
Normal Distribution
推移（y 方向）的副本
蜗牛壳模型

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Coordinates
Scatter Plot
Cosine
Area
Cone

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