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Angle at centre twice angle at circumference
Author:
Big Lee
GeoGebra
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兩組對邊相等和有直角的四邊形
四邊形的特性
兩位數除以一位數（一）
三位數除以一位數（二）
算柱 (兩位數)
Discover Resources
三角形的外心軌跡
測試: f(x)=sin(ax)+b 練習
B3C2-2例6-1
平行四邊形的副本
比較五件物件的重量
Discover Topics
Scalene Triangles
Optimization Problems
Arithmetic Operations
Correlation
Rational Numbers