Portal:Geometry/Selected picture

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Construction of an astroid
Construction of an astroid

In mathematics, an astroid is a particular type of curve: a hypocycloid with four cusps. It is also a super ellipse with n=2/3 and a=b. Its modern name comes from the Greek word for "star". The curve had a variety of names, including tetracuspid (still used), cubocycloid, and paracycle.

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