Editing Answers About Geometry

<br>The [https://www.renewableenergyworld.com/?s=perimeter perimeter] is both on the outside and the inside of a shape, as it is [https://www.biggerpockets.com/search?utf8=%E2%9C%93&term=basically basically] the outside wall/border of a shape and can therefore be viewed from the outsi<br>Read more<br><br><br><br><br><br><br><br><br><br>Math and  [https://w88s.uk/ pg slot] Arithmetic<br><br><br><br>+2<br><br><br><br><br><br><br><br><br><br>What is the circumference of a circle if its area is 81π?<br><br><br>Asked by Anonymous<br><br><br><br>C = 81 pi = 2pi r<br><br>Hence<br><br>2 pi r = 81pi<br><br>r = 81 pi / 2 pi<br><br>Cancel down<br><br>r = 40.5<br><br>A = pi r^(2)<br><br>A = pi ( 40.5)^(2)<br><br>A = 1640.25 pi units^(2)<br><br>