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  2. Roundness - Wikipedia

    en.wikipedia.org/wiki/Roundness

    Roundness is the measure of how closely the shape of an object approaches that of a mathematically perfect circle. Roundness applies in two dimensions , such as the cross sectional circles along a cylindrical object such as a shaft or a cylindrical roller for a bearing .

  3. Eccentricity (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Eccentricity_(mathematics)

    In mathematics, the eccentricity of a conic section is a non-negative real number that uniquely characterizes its shape. One can think of the eccentricity as a measure of how much a conic section deviates from being circular. In particular: The eccentricity of a circle is 0. The eccentricity of an ellipse which is not a circle is between 0 and 1.

  4. Glossary of mathematical symbols - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_mathematical...

    A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, or for structuring the other symbols that occur in a formula.

  5. Concentric objects - Wikipedia

    en.wikipedia.org/wiki/Concentric_objects

    In the Euclidean plane, two circles that are concentric necessarily have different radii from each other. [3] However, circles in three-dimensional space may be concentric, and have the same radius as each other, but nevertheless be different circles.

  6. List of formulas in elementary geometry - Wikipedia

    en.wikipedia.org/wiki/List_of_formulas_in...

    Shape Area Perimeter/Circumference Meanings of symbols Square: is the length of a side Rectangle (+)is length, is breadth Circle: or : where is the radius and is the diameter ...

  7. Is the Body Roundness Index the New BMI? What it Says ... - AOL

    www.aol.com/lifestyle/body-roundness-index-bmi...

    The Body Roundness Index is similar to the Body Mass Index, but relies on more anthropometric variables. The BRI which was first proposed in 2013 , uses height, weight, waist circumference, and ...

  8. Focus (geometry) - Wikipedia

    en.wikipedia.org/wiki/Focus_(geometry)

    The case H = 0 can be eliminated as degenerate, so the tangential equation of C can be written as P + fQ = 0 where f is an arbitrary polynomial of degree 2m. [1] For example, let m = 2, P 1 = (1, 0), and P 2 = (−1, 0). The tangential equations are + = = so P = X 2 − 1 = 0. The tangential equations for the circular points at infinity are

  9. What to know about body roundness index, an alternative to BMI

    www.aol.com/news/know-body-roundness-index...

    Body roundness index takes into account a person's height and waist circumference to determine whether they are in a healthy or unhealthy sphere, according to Maya Feller, a registered dietitian ...