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Line in the sand is an idiom, a metaphorical (sometimes literal) point beyond which no further advance will be accepted or made. Related terms include unilateral boundary setting , red lines and ultimatums to define clear consequences if a line is crossed.
In Australia, there is a special definition for a bend (or a horizontal bend) which is a connection between two tangent tracks at almost 180 degrees (with deviation not more than 1 degree 50 minutes) without an intermediate curve. There is a set of speed limits for the bends separately from normal tangent track. [5]
In the absence of a qualifier, the term bending is ambiguous because bending can occur locally in all objects. Therefore, to make the usage of the term more precise, engineers refer to a specific object such as; the bending of rods, [2] the bending of beams, [1] the bending of plates, [3] the bending of shells [2] and so on.
You might be surprised by how many popular movie quotes you're remembering just a bit wrong. 'The Wizard of Oz' Though most people say 'Looks like we're not in Kansas anymore,' or 'Toto, I don't think
The line through segment AD and the line through segment B 1 B are skew lines because they are not in the same plane. In three-dimensional geometry, skew lines are two lines that do not intersect and are not parallel. A simple example of a pair of skew lines is the pair of lines through opposite edges of a regular tetrahedron.
Line a is a great circle, the equivalent of a straight line in spherical geometry. Line c is equidistant to line a but is not a great circle. It is a parallel of latitude. Line b is another geodesic which intersects a in two antipodal points. They share two common perpendiculars (one shown in blue).
[a] Intuitively, a ray consists of those points on a line passing through A and proceeding indefinitely, starting at A, in one direction only along the line. However, in order to use this concept of a ray in proofs a more precise definition is required. Given distinct points A and B, they determine a unique ray with initial point A.
Next time you’re stuck in line and feeling annoyed, try to recognize what’s really bothering you and take a moment to stay calm. And rather than cutting ahead, think about keeping things fair ...