Results 1 to 4 of 4
  1. #1
    Glizdka is offline Senior Member
    • Member Info
      • Member Type:
      • Other
      • Native Language:
      • Polish
      • Home Country:
      • Poland
      • Current Location:
      • Poland
    Join Date
    Apr 2019
    Posts
    1,416

    Find the perimeter of an eClipse

    Matt Parker made a video about why there's no well-defined equation for calculating the perimeter of an ellipse.

    I think a /k/ slipped in at 5:00, making him accidentally say eclipse instead of ellipse. Am I right?

  2. #2
    GoesStation is offline Moderator
    • Member Info
      • Member Type:
      • Interested in Language
      • Native Language:
      • American English
      • Home Country:
      • United States
      • Current Location:
      • United States
    Join Date
    Dec 2015
    Posts
    22,024

    Re: Find the perimeter of an eClipse

    Yes.
    I am not a teacher.

  3. #3
    probus's Avatar
    probus is offline Moderator
    • Member Info
      • Member Type:
      • Retired English Teacher
      • Native Language:
      • English
      • Home Country:
      • Canada
      • Current Location:
      • Canada
    Join Date
    Jan 2011
    Posts
    5,639

    Re: Find the perimeter of an eClipse

    Although it is not part of elementary mathematics (because it uses integral calculus) there does indeed seem to be a formula for the circumference of an ellipse. See:

    https://proofwiki.org/wiki/Perimeter...2%CE%B8d%CE%B8
    Last edited by probus; 04-May-2021 at 01:41. Reason: Fix typos

  4. #4
    Glizdka is offline Senior Member
    • Member Info
      • Member Type:
      • Other
      • Native Language:
      • Polish
      • Home Country:
      • Poland
      • Current Location:
      • Poland
    Join Date
    Apr 2019
    Posts
    1,416

    Re: Find the perimeter of an eClipse

    Calculus can calculate any otherwise-uncalculatable object, no matter the shape or how non-Euclidian it is. The video is about there not being a neat formula, like the ones we have for many other geometric objects.



    "Seducing a woman is like the cotangent function. No matter how close I get, I can never quite touch the pi." - Sir Isaac Newton, inventor of calculus, died a virgin.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •