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高尔顿钉板
Author:
john arnold
GeoGebra
New Resources
圓的基本性質
斐波那契螺旋弧线（表格法-可动态调节）
龙形曲线-分形龙2
科赫雪花
盈利與虧蝕
Discover Resources
圆的面积展开
testdcfdfsdfsd
陳林本proof53
正割函數與餘割函數
長方形的周界與長和闊的關係 (學生版)
Discover Topics
Parametric Curves
Definite Integral
Distributions
Matrices
Optimization Problems