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圓例9
Author:
陳柄何
GeoGebra
New Resources
撒针估算面积实验
垂直線的斜率
圓的切線方程
龙形曲线-分形龙2
平行線的斜率
Discover Resources
乘法表的自动练习
Spiral Polyskelion
-1/8 ≤ cosα cosβ cosγ ≤ 1
Curtate Cycloid
杨辉三角