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斜坐標
Author:
陳柄何
GeoGebra
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镂空正方体案例对比
异形操场
折扣
斐波那契螺旋弧线(表格法-可动态调节)
椭圆内切圆链
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圖例
三角形面積
類正五邊形摺法
時鐘與數學
任意三角形
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Trigonometry
Angles
Median Line
Kite
Step Functions