Final Cover - For Printing

39. Point
    A point is a small mark having position but no magnitude/dimension. A mark made
    by the tip of the pen may be explained to understand the concept of point. The
    Braille dot may also be used us a general example, but Braille dot can have a small
    area too.


40. Ray
    A ray starts from a fixed point and extends endlessly in one direction. A ray XY is
    denoted as xy

The idea may be explained orally with the help of an embossed ray prepared on a

sheet. The arrow indicates infiniteness.

41. Line
    A line is a long narrow mark, which is nothing but a collection of points. A line is
    straight and extends endlessly in both directions. If the line is not straight, then the
    collection of points forms a curve.

The idea may be explained with an embossed line prepared on a braille sheet.

42. Line segment
    A line segment is a portion of a line with two end points. If P and Q denote the two
    end points of a line segment, then it is denoted as PQ.

The idea may be explained with the assistance of necessary text material in Braille.

An embossed line segment prepared on a sheet may be given to enhance the

understanding level of the child.

x y

A B

P Q

y