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正20面体
Author:
2143550746
GeoGebra
New Resources
異分母分數減法
兩位數除以一位數（二）
空间中两直线的位置关系
三位數除以一位數（一）
漂亮的摇摆曲线
Discover Resources
圖一
perimeter
angle sum of triangle
平面直角坐标系
橢圓包絡線1060406
Discover Topics
Distributions
Tangent Line or Tangent
Definite Integral
Derivative
Fractal Geometry