document.write( "Question 463029: Hi. I need help,please. Trying to find the formula to get the perimeter of an oval shape with the # 4 and 3. \n" ); document.write( "

Algebra.Com's Answer #317339 by Theo(13342) $\"\"$ $\"About$

You can put this solution on YOUR website!
This reference might be helpful.\r
\n" ); document.write( "\n" ); document.write( "http://www.easycalculation.com/area/learn-ellipse.php\r
\n" ); document.write( "\n" ); document.write( "the formula for the area of the ellipse is given as pi * r1 * r2\r
\n" ); document.write( "\n" ); document.write( "the formula for the perimeter of the ellipse is given as $\"2%2Api%2Asqrt%28%28%28r1%29%5E2%2B%28r2%29%5E2%29%2F2%29\"$ .\r
\n" ); document.write( "\n" ); document.write( "from what i read elsewhere, this is not an exact value, but an approximation.\r
\n" ); document.write( "\n" ); document.write( "the exact value involves the use of calculus.\r
\n" ); document.write( "\n" ); document.write( "an example for how to use this formula is:\r
\n" ); document.write( "\n" ); document.write( "let r1 = 3 and let r2 = 4.\r
\n" ); document.write( "\n" ); document.write( "the area of the ellipse is pi * 3 * 4 = 12 * pi = 37.69911184 square units.\r
\n" ); document.write( "\n" ); document.write( "the perimeter of the ellipse is $\"2+%2A+pi+%2A+sqrt%28%283%5E2%2B4%5E2%29%2F2%29\"$ .\r
\n" ); document.write( "\n" ); document.write( "that comes out to be $\"2+%2A+pi+%2A+sqrt%2812.5%29\"$ which becomes 7.071067812 * pi = 22.21441469 units.\r
\n" ); document.write( "\n" ); document.write( "you can round these answers to the nearest decimal place required.\r
\n" ); document.write( "\n" ); document.write( "just substitute your numbers for r1 and r2 to calculate what you require, if i understood your question correctly.\r
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