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正九邊形
Author:
李春培
正九邊形
GeoGebra
New Resources
判斷球體
找出對稱軸
兩位數加法
直角坐標平面上的旋轉變換
畫出對稱圖形
Discover Resources
轉動的水箱
厘米和毫米
莫比烏斯帶01
HW question locus 3
因數（1至24）
Discover Topics
Natural Numbers
Rotation
Parabola
Pythagoras or Pythagorean Theorem
Random Experiments