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球表面积的一种特殊推导
Author:
孟宝兴
GeoGebra
New Resources
四邊形的特性
畫出對稱圖形
兩位數加法
兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
Discover Resources
數位學習社12/15
封閉圖形填顏色
測試繪本
练习及小结
f(x)=sinx的圖形--伸縮與平移
Discover Topics
Rational Numbers
Geometric Transformations
Quadrilaterals
Solids or 3D Shapes
Parallelogram