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正二十面體
Author:
侯杰材
正二十面體
GeoGebra
New Resources
画直线等分三角形的面积
球体的体积推导
找出對稱軸
兩位數除以一位數（二）
球体的体积推导（优化版）
Discover Resources
Percentage Change(百分變化)
P53_3c
圓例2
拋物線2-焦點法
二倍角的正弦公式的证明
Discover Topics
Derivative
Rational Numbers
Geometric Distribution
Definite Integral
Linear Programming or Linear Optimization