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It is pi*2.1 = 6.60 units.

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Q: If the diameter is 2.1 what is the circumference?
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Related questions

What is the circumference of a circle that has a diameter of 21?

The circumference of a circle that has a diameter of 21 is about 65.97


If a circle has a diameter of 21 feet what is the circumference?

If a circle has a diameter of 21 feet the circumference is: 65.97 feet (diameter x Pi = circumference).


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