Solve this:

8.  What is the difference between parallel lines and perpendicular lines. Give each.

9.  Match the following

i)  Straight angle                                                       a)  Less than one-fourth of the revolution.
ii) Right angle                                                           b)  More than half a revolution.
iii) Acute angle                                                         c)  Half of a  revolution.
iv)  Obtuse angle                                                      d)  one - fourth of a revolution.
v) Reflex angle                                                         e)  Between  $\frac{1}{4} and \frac{1}{2}$ of a  revolution.
                                                                                f)  One complete revolution