Circumference & Area of Circles Quick Check
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Question
Which of the following uses the correct formula to find the approximate circumference of a circle that has a radius of 450?(1 point)
Responses
C≈3.14⋅4502
upper C approximately equals 3.14 times 450 squared
C≈3.14⋅150
upper C approximately equals 3.14 times 150
C≈2⋅3.14⋅450
upper C approximately equals 2 times 3.14 times 450
C≈3.14⋅450÷2
upper C approximately equals 3.14 times 450 divided by 2
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1 answer
To calculate the circumference of a circle, the correct formula is:
\[ C \approx 2 \pi r \]
where \( r \) is the radius of the circle. Given that the radius is 450, we substitute this value into the formula:
\[ C \approx 2 \cdot 3.14 \cdot 450 \]
Among the provided options, the correct response is:
C ≈ 2 ⋅ 3.14 ⋅ 450
This choice uses the correct formula for finding the circumference.
