Q

# Which pairs of following angles are complementary ?

1.(iv)  Which pairs of following angles are complementary?

The sum of the two angles is :      $=\ 35^{\circ}\ +\ 55^{\circ}\ =\ 90^{\circ}$
In complementary angles sum of the angles is $90^{\circ}$.  Hence given pair of angles are complementary to each other.