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Circumference & Area of Circles Quick Check
1 of 51 of 5 Items
Question
Which of the following uses the correct formula to find the approximate circumference of a circle that has a radius of 12? Use 3.14 for π
and express your answer to the hundredths place.(1 point)
Responses

452.16
452.16

37.68
37.68

75.36
75.36

18.84
18.84
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1 answer

To find the approximate circumference of a circle, you can use the formula:

\[ C = 2 \pi r \]

where \( C \) is the circumference, \( r \) is the radius, and \( \pi \) is approximately 3.14.

Given that the radius \( r \) is 12, we can substitute the values into the formula:

\[ C = 2 \times 3.14 \times 12 \]

Calculating this step by step:

  1. Multiply \( 2 \times 3.14 = 6.28 \)
  2. Then multiply by the radius: \( 6.28 \times 12 = 75.36 \)

So, the approximate circumference of the circle is \( 75.36 \).

The correct answer is:

75.36