An object is described to have a zero dimension if it has no height, width or depth.For example a point is 0 dimensional.A two-dimensional object is one whose position can be described using the x-axis and y-axis.This is to say that such objects have both horizontal and vertical displacement component.For example a triangle and plane.A line is 1 dimensional because it has length.A ray is 1 dimensional because it never end on one side.A segment is part of a line hence its 1 dimensional.
