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Author:
Big Lee
GeoGebra
New Resources
畫出對稱圖形
兩位數除以一位數（二）
三位數除以一位數（一）
近似值：有效數字
兩組對邊相等和有直角的四邊形
Discover Resources
五角星
Sine Wave 3D
Quiz on Solving Quadratic Inequalities 解二次不等式：測驗 (v2018)
三年級除法(三)：一位數除三位數
椭圆的定义
Discover Topics
Scalene Triangles
Prism
Subtraction
Stochastic Process or Random Process
Arithmetic Mean