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  2. Arc length - Wikipedia

    en.wikipedia.org/wiki/Arc_length

    Arc length is the distance between two points along a section of a curve. ... define the arc length as limit of the sum of linear segment lengths for a regular ...

  3. Calculus of variations - Wikipedia

    en.wikipedia.org/wiki/Calculus_of_Variations

    The arc length of the curve ... the shortest distance between two points is a straight line. ... can be made arbitrarily small by choosing piecewise linear functions ...

  4. Distance from a point to a line - Wikipedia

    en.wikipedia.org/wiki/Distance_from_a_point_to_a...

    The distance (or perpendicular distance) from a point to a line is the shortest distance from a fixed point to any point on a fixed infinite line in Euclidean geometry. It is the length of the line segment which joins the point to the line and is perpendicular to the line. The formula for calculating it can be derived and expressed in several ways.

  5. Great-circle distance - Wikipedia

    en.wikipedia.org/wiki/Great-circle_distance

    A diagram illustrating great-circle distance (drawn in red) between two points on a sphere, P and Q. Two antipodal points, u and v are also shown. The great-circle distance, orthodromic distance, or spherical distance is the distance between two points on a sphere, measured along the great-circle arc between them. This arc is the shortest path ...

  6. Metric space - Wikipedia

    en.wikipedia.org/wiki/Metric_space

    Suppose that the length of the curve γ is equal to the distance between its endpoints—that is, it is the shortest possible path between its endpoints. After reparametrization by arc length, γ becomes a geodesic: a curve which is a distance-preserving function. [15] A geodesic is a shortest possible path between any two of its points. [c]

  7. Geographical distance - Wikipedia

    en.wikipedia.org/wiki/Geographical_distance

    The slant distance s (chord length) between two points can be reduced to the arc length on the ellipsoid surface S as: [21] = (+) / / where R is evaluated from Earth's azimuthal radius of curvature and h are ellipsoidal heights are each point. The first term on the right-hand side of the equation accounts for the mean elevation and the second ...

  8. Position (geometry) - Wikipedia

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

    Its length represents the distance in relation to an arbitrary reference origin O, ... The linear span of a basis set B = {e 1, e 2, ... arc length of the curve. ...

  9. Linear motion - Wikipedia

    en.wikipedia.org/wiki/Linear_motion

    Linear motion, also called ... is arc length, is the distance from the axis to any point, and is the tangential acceleration, which is the component of the ...