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正多邊形各邊中點連線所圍成的圖形
Author:
Jimmy Ma
GeoGebra
New Resources
四邉形 (四年級) 教師版
找出對稱軸
兩位數除以一位數（一）
異分母分數減法
算柱 (兩位數)
Discover Resources
轉動的水箱
有趣的軌跡圖
函數
角的大小比較
自动变大标签模板
Discover Topics
Parallelogram
Constructions
Scatter Plot
Complex Numbers
Hypergeometric Distribution