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Angle at centre twice angle at circumference
Author:
Big Lee
GeoGebra
New Resources
畫出對稱圖形
兩位數加法
兩位數除以一位數（一）
兩組對邊相等的四邊形
三位數除以一位數（一）
Discover Resources
区域面积
Is this a prism 13
Copy of 茵01
中垂線
平行四邊形堆垛
Discover Topics
Arithmetic
Fractal Geometry
Geometry
Root
Piecewise Functions