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Spiral ( Dreamstime Symbol ) Stock Image


Spiral ( Dreamstime symbol ) Stock Photo
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Spiral ( Dreamstime symbol ) #79733173
Description

Sagittal court of a fossil ammonites. A two-dimensional spiral may be described most easily using polar coordinates, where the radius r is a monotonic continuous function of angle θ. The circle would be regarded as a degenerate case the function not being strictly monotonic, but rather constant.