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Author:
Lin Ching Chieh
GeoGebra
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錐體建築師
【案例】2013年安徽高考15题
兩位數除以一位數（一）
兩組對邊相等的四邊形
兩組對邊相等和有直角的四邊形
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拿破崙三角形
Properties of a Square
start and end clock face
橢圓軌跡01
未命名圆锥的副本
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Mathematics
Real Numbers
Exponent
Quadrilaterals
Triangles