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What is the circumference of a circle with a diameter of 4 cm?

Answer 1

Theodore Abad

#4 \pi# cm

#pi# is defined as the ratio of a circle's circumference #C# to its diameter #d#. So

#C = \pi d = 4 pi # cm

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Answer 2

Sadie Allen

4#pi#

the diameter is 4 cm which means the radius is 2 cm. Diameter divided by two will give you the radius. The formulae for circumference is 2 #pi*r#. So the circumference would be 4#pi#

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Answer 3

Carson Arnold

The circumference of a circle with a diameter of 4 cm is approximately 12.57 cm.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.