Question 463029
This reference might be helpful.

<a href = "http://www.easycalculation.com/area/learn-ellipse.php" target = "_blank">http://www.easycalculation.com/area/learn-ellipse.php</a>

the formula for the area of the ellipse is given as pi * r1 * r2

the formula for the perimeter of the ellipse is given as {{{2*pi*sqrt(((r1)^2+(r2)^2)/2)}}}.

from what i read elsewhere, this is not an exact value, but an approximation.

the exact value involves the use of calculus.

an example for how to use this formula is:

let r1 = 3 and let r2 = 4.

the area of the ellipse is pi * 3 * 4 = 12 * pi = 37.69911184 square units.

the perimeter of the ellipse is {{{2 * pi * sqrt((3^2+4^2)/2)}}}.

that comes out to be {{{2 * pi * sqrt(12.5)}}} which becomes 7.071067812 * pi = 22.21441469 units.

you can round these answers to the nearest decimal place required.

just substitute your numbers for r1 and r2 to calculate what you require, if i understood your question correctly.