Unit Circles in $\mathbb{R} ^2$

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So I am asked to plot, for a given $p$, the $unit\space circles\space in \space \mathbb{R} ^2$. (No further information has been provided about $p$.

So what I understand is that an $unit \space circle$ is a circle with a radius of 1. So what does it mean to plot $unit\space circles\space in \space \mathbb{R} ^2$? I emphasize the word circles.

What am I missing?

Here it is, word to word, because obviously, it is quite ambiguous.

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