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  2. Ellipse - Wikipedia

    en.wikipedia.org/wiki/Ellipse

    An ellipse (red) obtained as the intersection of a cone with an inclined plane. Ellipse: notations Ellipses: examples with increasing eccentricity. In mathematics, an ellipse is a plane curve surrounding two focal points, such that for all points on the curve, the sum of the two distances to the focal points is a constant.

  3. Perimeter of an ellipse - Wikipedia

    en.wikipedia.org/wiki/Perimeter_of_an_ellipse

    In more recent years, computer programs have been used to find and calculate more precise approximations of the perimeter of an ellipse. In an online video about the perimeter of an ellipse, recreational mathematician and YouTuber Matt Parker, using a computer program, calculated numerous approximations for the perimeter of an ellipse. [4]

  4. Perimeter - Wikipedia

    en.wikipedia.org/wiki/Perimeter

    The perimeter of a circle or an ellipse is called its circumference. Calculating the perimeter has several practical applications. A calculated perimeter is the length of fence required to surround a yard or garden. The perimeter of a wheel/circle (its circumference) describes how far it will roll in one revolution. Similarly, the amount of ...

  5. Ellipsoid - Wikipedia

    en.wikipedia.org/wiki/Ellipsoid

    Hence, it is confocal to the given ellipse and the length of the string is l = 2r x + (a − c). Solving for r x yields r x = ⁠ 1 / 2 ⁠ (l − a + c); furthermore r 2 y = r 2 x − c 2. From the upper diagram we see that S 1 and S 2 are the foci of the ellipse section of the ellipsoid in the xz-plane and that r 2 z = r 2 x − a 2.

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    TikTok creator Joe Smith confirmed that his six-year-old daughter Jules Smith died on Monday, Dec. 9 after she was diagnosed with a fatal brain tumor. In a video captioned "We love you our little ...

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    From January 2008 to October 2008, if you bought shares in companies when John R. H. Bond joined the board, and sold them when he left, you would have a -63.9 percent return on your investment, compared to a -35.9 percent return from the S&P 500.

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    A Colorado school bus driver allegedly abandoned 40 elementary school-aged students at the wrong stop on Monday, leaving them frightened in the cold and dark, school officials and students say.

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