Question #0262a

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Question #0262a

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Answer 1 · 2016-12-27T03:26:59

Circumference = 219.91 cm
Area = $3848.45 c m^{2}$ $3848.45 cm^2$

Explanation:

The circumference of a circle can be obtained by using the equation below:

![http://www.wikihow.com/Calculate-the-Circumference-of-a-Circle]( useruploads.socratic.org )

where the mathematical constant, $π$ $pi$ , has a value of approximately 3.14 and $r$ $r$ represents the radius of the circle.

All we have to do is multiply the given diameter by $π$ $pi$ to determine C:

$Circumference = 70 c m \times π$ $"Circumference" = 70cm xx pi$
$Circumference = 219.91 c m$ $"Circumference" = 219.91 cm$

The area can be computed by using the following equation:

![http://areacircle.com/]( useruploads.socratic.org )

This equation requires that we have a radius instead of a diameter, but that's no problem since the radius is half of the diameter. Therefore, the radius is $\frac{1}{2} (70 c m)$ $1/2(70cm)$ or just 35 cm.

The area is: $π \times {(35 c m)}^{2}$ $pixx(35cm)^2$ = $3, 848.45 c m^{2}$ $3,848.45cm^2$

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Question #0262a

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