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## Line
The word linum, meaning flax plant from which linen is produced; at one time, a stretched linen thread was the most reliable way to determine a straight line. Also see liner and lining.
The word ## Electrical engineering
In electrical engineering, a
In telecommunications, a telephone ## Mathematics
A
If geometry is developed axiomatically (as in Euclid's
In Euclidean space
a and b are given vectorss in R^{n} with b non-zero. The vector b describes the direction of the line, and a is a point on the line. Different choices of a and b can yield the same line.
One can show that in
a, b and c such that a and b are not both zero. An important property of these lines is their slope.More abstractly, one usually thinks of the real line as the prototype of a line, and assumes that the points on a line stand in a one-to-one correspondence with the real numbers. However, one could also use the hyperreal numbers for this purpose, or even the long line of topology. The "straightness" of a line, interpreted as the property that it minimizes distances between its points, can be generalized and leads to the concept of geodesics on differentiable manifolds. | |||||

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