(adsbygoogle = window.adsbygoogle || []).push({}); Is "radius" a misnomer in a polar equation?

Often I see the description of "r" in a polar equation r = r(theta) as being "radius", but "radius" is a length, and here you can have a negative r. Hence "radius" is a misnomer, as far as I can tell. Perhaps it would be better described with some term like "signed radius" or some vector terminology?

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# Is radius a misnomer in a polar equation?

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