Question

Find the circumference of a circle with an area of 530.93 square meters round to the nearest hundred

Answer 1

Answer:

81.6 meters

Step-by-step explanation:

We know the area of the circle is 530.93 square meters. We use the formula for the area of a circle to find r using inverse operations.

$A=\pi r^{2} \\530.93=\pi r^{2} \\\frac{530.93}{\pi } =\frac{\pi r^{2} }{\pi } \\169.0859=r^{2} \\\sqrt{169.0859}=r\\ 13=r$

We now know the radius. We can substitute it into the circumference formula to find its value.

$C=2\pi r\\C=2\pi (13)\\C=81.64$