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双镜面反射问题
Author:
孟宝兴
Topic:
Symmetry
GeoGebra
New Resources
兩組對邊相等的四邊形
三位數除以一位數（一）
球体的体积推导（优化版）
判斷球體
三位數除以一位數（二）
Discover Resources
speed
Prism and Cylinder 4
定积分的概念
外心
禪繞畫
Discover Topics
Geometry
Numbers
Indefinite Integral
Straight Lines
Hypergeometric Distribution