Question

The area of the circle above is 1,384.74 units2. What is the circumference of the circle? Use = 3.14.

Answer 1

First divide the area by 3.14. Which is 441. 441 is your radius squared. Then you have to find the root of 441 which is 21. 21 is your radius. Then you must add 21 to 21 to find your diameter. That is 42. Then plug 42 in your circumference formula. Which is then C= 3.14 (42). Which means the circumference is 131.88.

Answer 2

The circumference of the circle is 131.88.

What is the area of the circle?

The area of the circle is given by;

$\rm Area \ of \ Circle =\pi r^2\\\\Where; \ r = radius$

The area of the circle above is 1,384.74 units2.

The circumference of the circle is;

$\rm Circumference=2\pi r$

The area of the circle is;

$\rm Area \ of \ Circle =\pi r^2\\\\ 1384.74=\pi r^2\\\\r^2=\dfrac{ 1384.74}{3.`14}\\\\r^2=441\\\\r^2=21^2\\\\r=21$

The circumference of the circle is;

$\rm Circumference=2\pi r\\\\Circumference=2\times 3.14\times 21\\\\ Circumference= 131.88$

Hence, the circumference of the circle is 131.88.

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