Letter b. said that If two lines are parallel, then they never intersect.
the line is parallel if and only if extending line in the same direction and remaining the same distance apart, It also parallel if the lines that are in the same plane that do not intersect. In addition, it may also parallel lines if the straight line that always stay the same distance away from each other. The term Parallel defined two lines are parallel if they are in the same plane and never intersect. In the book of Euclidean geometry, parallel line always equidistant. In addition, parallel lines, curves and planes never meet however far they are produced.
