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

Question

asked Dec 6, 2019 205k views

2 Answers

Teiem · Answer 1 · 2019-12-11T00:55:55+0000

Answer:

81.6 meters

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.

$A=\pi r^(2) \\530.93=\pi r^(2) \\(530.93)/(\pi ) =(\pi r^(2) )/(\pi ) \\169.0859=r^(2) \\√(169.0859)=r\\ 13=r$

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

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