Conchoid (mathematics)
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. A conchoid is a curve derived from a fixed point O, another curve, and a length d. For every line through O that intersects the given curve at A the two points on the line which are d from A are on the conchoid. The conchoid is, therefore, the cissoid of a circle with center O and the given curve. He called them conchoids because the shape of their outer branches resemble conch shells.The often-so-called conchoid of de Sluze and conchoid of Dürer do not fit this defi...
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. A conchoid is a curve derived from a fixed point O, another curve, and a length d. For every line through O that intersects the given curve at A the two points on the line which are d from A are on the conchoid. The conchoid is, therefore, the cissoid of a circle with center O and the given curve. He called them conchoids because the shape of their outer branches resemble conch shells.The often-so-called conchoid of de Sluze and conchoid of Dürer do not fit this definition; the former is a strict cissoid and the latter a construction more general yet.
