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正方形
Author:
Yip Chi Wai
Topic:
Square
GeoGebra
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算柱 (兩位數)
小数 的副本
兩組對邊相等的四邊形
近似值：有效數字
球體建築師
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正方形和長方形有甚麼特性？
螺旋正方形
【立体字】劳动节5.1
相反数 思考（教材第10页）
正方形
Discover Topics
Median Line
Tree Diagrams
Mode
Geometry
General Quadrilateral