question_answer 1)

Indicate which pairs of angles are:                                         (i) Vertically opposite angles.                                        (ii) Linear pairs.                    

Answer:

                (i) \[\angle 1\] and \[\angle 4\]                                             (ii) \[\angle 4\] and \[\angle 5;\angle 5\] and \[\angle 1;\angle 3\] and \[(\angle 1+\angle 2);\angle 4\] and \[(\angle 3+\angle 2)\].