Eccentricity of the Ellipse

  • Thread starter TonyC
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  • #1
TonyC
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How would I find the eccentricity of the ellipse:
x^2/49 + y^2/64 = 1

:confused:
 

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  • #2
TD
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The standard form of an ellipse is [tex]\frac{{x^2 }}{{a^2 }} + \frac{{y^2 }}{{b^2 }} = 1[/tex].

Another constant c is defined as: [itex]c^2 \equiv a^2 - b^2[/itex]

Finally, we define the eccentricity as: [itex]e = \frac{c}{a}[/itex]
 
  • #3
HallsofIvy
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Do you know a formula for eccentricity? I would be very surprized if your textbook asks a question like this and does not include a formula!

If your textbook does not have such a formula or you do not have a textbook (not a good idea!) you could go to "google.com" and enter "ellipse eccentricity". I just did that and found a very simple formula at the first hit.
 
  • #4
TonyC
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Thank you very much
 

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