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Round Rock Hill
Round or rounds may refer to: Mathematics and science * The contour of a closed curve or surface with no sharp corners, such as an ellipse, circle, rounded rectangle, cant, or sphere * Rounding, the shortening of a number to reduce the number of significant figures it contains * Round number, a number that ends with one or more zeroes * Roundness (geology), the smoothness of clastic particles * Roundedness, rounding of lips when pronouncing vowels * Labialization, rounding of lips when pronouncing consonants Music * Round (music), a type of musical composition * ''Rounds'' (album), a 2003 album by Four Tet Places * The Round, a defunct theatre in the Ouseburn Valley, Newcastle upon Tyne, England * Round Point, a point on the north coast of King George Island, South Shetland Islands * Grand Rounds Scenic Byway, a parkway system in Minneapolis * Rounds Mountain, a peak in the Taconic Mountains, United States * Round Mountain (other), several places * Round Valley (di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ellipse
In mathematics, an ellipse is a plane curve surrounding two focus (geometry), focal points, such that for all points on the curve, the sum of the two distances to the focal points is a constant. It generalizes a circle, which is the special type of ellipse in which the two focal points are the same. The elongation of an ellipse is measured by its eccentricity (mathematics), eccentricity e, a number ranging from e = 0 (the Limiting case (mathematics), limiting case of a circle) to e = 1 (the limiting case of infinite elongation, no longer an ellipse but a parabola). An ellipse has a simple algebraic solution for its area, but only approximations for its perimeter (also known as circumference), for which integration is required to obtain an exact solution. Analytic geometry, Analytically, the equation of a standard ellipse centered at the origin with width 2a and height 2b is: : \frac+\frac = 1 . Assuming a \ge b, the foci are (\pm c, 0) for c = \sqrt. The standard parametric e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
