question_answer 13)

Fill in the blanks: (i) If two angles are complementary, then the sum of their measures is ....... (ii) If two angles are supplementary, then the sum of their measures is ....... (iii) Two angles forming a linear pair are ....... (iv) If two adjacent angles are supplementary, they form a ....... (v) If two lines intersect at a point, then the vertically opposite angles are always ...... . (vi) If two lines intersect at a point, and if one pair of vertically opposite angles are acute angles, then the other pair of vertically opposite angles are ...... .                

Answer:

                (i) \[\text{9}{{0}^{o}}\]                                  (ii) \[\text{18}{{0}^{o}}\]                  (iii) supplementary          (iv) linear pair (v) equal                              (vi) obtuse angles