Question #39e7f

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Question #39e7f

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Answer 1 · 2018-01-09T02:26:35

$4 π$ $4pi$

Explanation:

The formula for the circumference of a circle with radius r is $2 r π$ $2rpi$ . We replace r with $2$ $2$ to get $2 \cdot 2 π = 4 π$ $2*2pi=4pi$ .

So the answer is $4 π$ $4pi$ .

Answer 2 · 2018-01-09T02:28:34

$2 π (2) = 4 π \approx 12.566$ $2pi(2) = 4pi ~~ 12.566$

Explanation:

The equation to calculate the circumference of a circle is $2 π r$ $2pir$ or $π d$ $pid$ (they are the same since $d = 2 r$ $d = 2r$ when d is the diameter and r is the radius.

Therefore, you just need to plug the radius of 2 into the equation $2 π r$ $2pir$ to find the circumference:
$2 π (2) = 4 π \approx 12.566$ $2pi(2) = 4pi ~~ 12.566$

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