The formula C = π2r
Is used for the circumference.
Which of the following can be calculated using the formula?
We know that the number π is defined as the quotient between the circumference of a circle and its diameter, so we can write:
C/d = π
And remember that the diameter is twice the radius, so we can write:
d = 2r
Then we can rewrite the equation for the circumference as:
C = π2r
Then we conclude that the correct option is B.
If you want to learn more about circles:
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