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8条相切的抛物线
Author:
赵林
Topic:
Parabola
GeoGebra
New Resources
小数 的副本
拼砌四邊形
三位數除以一位數（二）
三位數除以一位數（一）
近似值：有效數字
Discover Resources
Triangular Number 三角形數
圓周率圓周率
Parabola_Horizontal
軌跡 拋物線 (與點及線等距)
ptccs2new4
Discover Topics
Cone
Frequency Distribution
Polygons
Geometric Transformations
Arithmetic