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The circumference of a circle can be found with this formula:

Circumference = 2*(radius)*∏ where ∏ can be rounded to 3.14

Plugging in your radius of 4:

Circumference = 2*4*∏ = 8*∏ which is around 25.13.

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Q: What is the circumference of a circle with the radius if 4?
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