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圆内接及外切正多边形
Author:
张书真
Topic:
Geometry
GeoGebra
New Resources
科赫雪花
正方形雪花图案
活动三：应用性质
斐波那契螺旋弧线（表格法）
撒针估算面积实验
Discover Resources
Quiz on Scientific Notation 科學記數法：測驗
抛物线
Copy of 方格紙上畫四邊形
圈柱(可調整內半徑、外半徑，柱高)
n等分单位圆作正弦曲线
Discover Topics
Reflection
Functions
Trapezoid
Numbers
Sine