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拋物面的光學性質
Author:
宋政蒲
GeoGebra
New Resources
畫出對稱圖形
兩組對邊相等的四邊形
球体的体积推导（优化版）
找出對稱軸
異分母分數減法
Discover Resources
正n邊形的組合
Similar triangles inscribed iteration
Rolling Square
Ex (RHS)
GGB10
Discover Topics
Angles
Logarithm
Random Experiments
Natural Numbers
Parabola