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一元二次方程求根公式
Author:
梁航宇
GeoGebra
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拼砌四邊形
三位數除以一位數（二）
兩組對邊相等的四邊形
畫出對稱圖形
找出對稱軸
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三角型
冪函數
指數函數的圖形(2)
How to draw a heptagon with ruler andcomp…
定积分中的二次函数曲边三角形面积.许兴华数学
Discover Topics
Plane Figures or Shapes
Histogram
Variance
Binomial Distribution
Geometric Distribution