The Astroid Curve and Its Tangent

作者：David Hamill

Adjust the value of a and move the point A to see how the curve and it's tangent varies, along with the line segment from each axes along the tangent.

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Section prism plane through 3 points.
Incenter Circumcenter
Kite 7/9
A Happy Polar Leaf

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拋物線
3D 向量（三維）
三角函數
統計特徵
二次函數

The Astroid Curve and Its Tangent

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