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Bunuel
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Bunuel
What is the circumference of a circle with radius π?

(A) π
(B) 2π
(C) π^2
(D) 4π
(E) 2π^2
When a variable is also in the formula needed for the answer, I sometimes break the formula down to avoid arithmetic error.

\(r = π\)
Circumference = \(2πr =(2)(π)(r)\)

Circumference = \((2)(π)(π)=2(π^2)\)

Answer E
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Using the formulae of Circumference of the circle. Answer is 2(π2)
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Bunuel
What is the circumference of a circle with radius π?

(A) π
(B) 2π
(C) π^2
(D) 4π
(E) 2π^2

If the radius is π, then the circumference of the circle is 2 x π x π = 2π^2.

Answer: E
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