If $pi$ equals $22/7$ and the radius of a circle is $1$ $3/4$ in, what is the circumference?

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Answer 1 · 2016-01-24T19:26:24

Approximately $11$ in

Please note that $pi$ is not equal to $22/7$

$22/7$ is a rational number equal to $3.bar(142857)$

$pi$ is an irrational number whose decimal expansion starts...

$3.141592653589793238462643383279502884...$

Using the approximation $pi ~~ 22/7$ and the formula $c = 2pi r$ we find:

$c = 2pi r ~~ 2 * 22/7 * 1 3/4 =2 * 22/7 * 7/4 = 44/4 = 11$ in

If pipi equals 22/722/7 and the radius of a circle is 113/43/4 in, what is the circumference?