Respuesta :

Answer:

1 cm

Step-by-step explanation:

We know that the formula for the circumference of a circle is [tex]2\pi r[/tex], where [tex]r[/tex] is the radius.

Because the circumference of the circle in the question is [tex]2 \pi[/tex], we have

[tex]2\pi = 2 \pi r[/tex]

So [tex]r=1[/tex] (cm).

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