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內切圓滾動
Author:
李春培
內切圓滾動
GeoGebra
New Resources
近似值：有效數字
Fibonacci Clock
找出對稱軸
小数 的副本
兩組對邊相等的四邊形
Discover Resources
多邊形的切割與拼砌
mario
香港的硬幣
图形的旋转
函數的面積 (黎曼和) 的複本
Discover Topics
Set Theory
Ellipse
Conditional Probability
Rational Numbers
Mathematics