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Sai International School

                                                        Class-VII

               MATHEMATICS


               Ch- 5- Lines and Angles-

               Activity-1


               TOPIC- Lines And Angles

               L.O- Co interior angles of a parallel lines make 180 or Supplementary


               Previous  Knowledge: Angle, types of angles, Opposite angles, Supplementary angles ,
               complementary anles













               Materials required : paper, colour ruler, glue

               Procedure: 1- Draw a pair of  parallel lines .

























               2-Two co interior angles are marked coloured  and cut

               3- The cut out angles are pasted on a marked point on one side of the line

               Observation;


               A pair of co-inerior angle is always 180, if the lines are parallel

               Conclusion: Co-inerior angles are always supplementary, if the lines are parallel
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