Find the length of the radius of a circle with a circumference of $31.4$ units.
Answer 1
Ella Lewis
To find the radius of a circle, we use the formula for the circumference of a circle:
$C = 2\pi r$
Given that the circumference $C$ is $31.4$ units, we can solve for the radius $r$.
$31.4 = 2\pi r$
Divide both sides by $2\pi$:
$r = \frac{31.4}{2\pi}$
Using the approximate value of $\pi \approx 3.14$:
$r = \frac{31.4}{2 \times 3.14} = \frac{31.4}{6.28} = 5$
Therefore, the radius of the circle is $5$ units.
Answer 2
Daniel Carter
The formula for the circumference of a circle is
$C = 2pi r$
Given the circumference $C = 31.4$ units, we can solve for $r$:
$31.4 = 2pi r$
Divide both sides by $2pi$:
$r = frac{31.4}{2pi}$
Approximating $pi$ as $3.14$:
$r = frac{31.4}{6.28} = 5$
The radius of the circle is thus $5$ units.
Answer 3
Joseph Robinson
Using the circumference formula $C = 2pi r$ with $C = 31.4$ units:
$31.4 = 2pi r$
Solve for $r$:
$r = frac{31.4}{2pi} approx 5$
The radius is $5$ units.
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