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SAI International School

                                                              Class -7
                      MATHEMATICS
                      Ch-5- LINES AND ANGLES

                      HOME ASSIGNMENT Answer

               1.  Identify which of the following pairs of angles are complementary and which are
                  supplementary.
                  (i)    130º, 50º  (ii) 45º, 45º (iii) 80º, 10º-- Complementary- ii   , Supplementary- i

               2.  Find the angle which is equal to its supplement.-  90

               3.  Can two angles be supplementary if both of them are  right?- YES




               4.  In the given figure:
















                  (i)    Is ∠1 adjacent to ∠2?- yes
                  (ii)    Is ∠AOC adjacent to ∠AOE?no
                  (iii)    Do ∠COE and ∠EOD form a linear pair? yes
                  (iv)    Are ∠BOD and ∠DOA supplementary?yes
                  (v)    Is ∠1 vertically opposite to ∠4? yes
                  (vi)    What is the vertically opposite angle of ∠5?  Ans - Angle BOC

                 5.  Indicate which pairs of angles are:














                  (i) Vertically opposite angles. – 1,4
                  (ii) Linear pairs. 4,5
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