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# What is the forular/working out of- ellipse with a long axis 2.500mm and short axis .850 (double the 0.425 radius) the area is 1.669 thus the area of the part circle is 0.835. what is the formular

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• kenpie Nov 01, 2008

the answer to my problem (whats the area of an ellipse part circle with a long axis of 2.500mm and radius is .425) is the area is 0.835 but how have i achieved this.

• kenpie Nov 02, 2008

You will never know how relieved I am and how helpfull your explination of the equation has been, as I have now realised where I went wrong and came to think the answer was .834 I have ended up with a 1/4 section of the Ellipse when the true area of the problem is double that. 3.1416 x 2.500 x .425 :- 2 = 1.66 not 3.1416 x 2.500 x .425 ;- 4 = .834 This might seem trivial to most but i needed to find the area of this as its the measurement of a bay window floor and needed the accurate measure, once again thank you very much, your on my christmass card list. cheers

• Loringh May 11, 2010

Loringh

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I'm not sure what your ellipse looks like but the equation for the area of an ellipse is given by:

pi times the long axis times the short axis

pi = 3.1416
The length of the long axis is from the center of the ellipse to the outer edge of the ellipse
The length of the short axis is from the center of the ellipse to the outer edge of the ellipse

Hope this helps Loringh

Posted on Nov 02, 2008

• Loringh Nov 03, 2008

Would appreciate your positive feedback to FixYa

Loringh

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Hi,
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Posted on Jan 02, 2017

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