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SAI International School
                                                       CLASS -IX

               Mathematics
               CHAPTER-6: Parallel Lines and Transversal

               Mind Map-2



               MIND MAP








                                                      PARALLEL LINES





                                                                            CONVERSE PROPERTIES OF
                                                                                   PARALLEL LINES
                                                                                If two lines are cut by a
                                                                                transversal such that,
                       PROPERTIES OF PARALLEL LINES
                                                                             1.  A  pair of corresponding
                 If a transversal intersects two parallel lines,then                angles is equal
                 1. Each pair of corresponding angles are equal.                            or
                    2.Each pair of alternate angles are equal.              2. A pair of alternate angles is

                      3.Sum of a pair of co-interior angles is                            equal
                              supplementary i.e 180   0                                     or

                                                                             3.Sum of a pair of co-interior
                                                                               angles is supplementary,
                                                                           then  the two lines are parallel.












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