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正七邊形
Author:
李春培
正七邊形
GeoGebra
New Resources
錐體建築師
四邉形 (四年級) 教師版
三位數除以一位數（二）
找出對稱軸
小数 的副本
Discover Resources
Equal chords and their distances from the centre
中垂線性質
題 2
对数函数——底数大小与图形
乘法表的自动练习的副本
Discover Topics
Arithmetic Operations
Plane Figures or Shapes
Angles
Addition
Parallelogram