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Author:
Henry Hsieh
GeoGebra
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柱體建築師
球体的体积推导（优化版）
畫出對稱圖形
拼砌四邊形
兩組對邊相等和有直角的四邊形
Discover Resources
小学数学
畢氏定理
二次函數03
Multiplication of Polynomials (多項式的乘法 2)
C60足球模型（弧线）
Discover Topics
Square
Upper and Lower Sum or Riemann Sum
Arithmetic Mean
Root
Constructions