limiting parallel मीनिंग इन हिंदी

Another special curve is the horocycle, a curve whose normal radii are limiting parallel to each other ( all converge asymptotically in one direction to the same ideal point ).
As in the illustration through a point " a " not on line " l " there are two limiting parallel lines, one for each direction ideal point of line l.
The limiting parallels make an angle " ? " with " PB "; this angle depends only on the Gaussian curvature of the plane and the distance " PB " and is called the angle of parallelism.
A ray Aa is a limiting parallel to a ray Bb if they are coterminal or if they lie on distinct lines not equal to the line AB, they do not meet, and every ray in the interior of the angle BAa meets the ray Bb.