Which of the following are models for parallel lines, perpendicular lines and which are neither of them. i) The vertical window bars, ii) Railway lines (track), iii) The adjacent edges of door, iv) The letter ‘V’ in English Alphabet, v) The opposite edges of a Black Board.

Answer

i) Parallel lines , (ii) Parallel lines, (iii) perpendicular, (iv) neither of them (v) Parallel