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椭圆内反射
Author:
dhc987
GeoGebra
New Resources
【案例】圆柱体内放置一个大球六个小球
兩位數除以一位數（二）
球体的体积推导（优化版）
異分母分數減法
兩組對邊相等的四邊形
Discover Resources
車線.ggb
接听率与人工呼入量、人工呼出量之间的关系
垂直線的斜率_hui sir
中華民國國旗
Properties of parallelogram(平行四邊形的性質)
Discover Topics
Vectors
Definite Integral
Similar Triangles
Unit Circle
Statistical Characteristics