How is a 2-sphere in a 3 dimensional space?(adsbygoogle = window.adsbygoogle || []).push({});

I do not understand how, according to wikipedia, a 2-sphere is a "2-dimensional surface (which is embedded in 3-dimensional space)."

Why is it not a 3-dimensional surface, since we need 3 coordinates to determine a point on the sphere?

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# Homework Help: How is a 2-sphere in a 3 dimensional space?

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