3. Identify which of the following pairs of angles are complementary and which are supplementary.
We know that the sum of supplementary angles is and the sum of complementary angle is .
(i) Sum of the angles is : . Hence these are supplementary angles.
(ii) Sum of the angles is : . Hence these are complementary angles.
(iii) Sum of the angles is : . Hence these are supplementary angles.
(iv) Sum of the angles is : . Hence these are supplementary angles.
(v) Sum of the angles is : . Hence these are complementary angles.
(vi) Sum of the angles is : . Hence these are complementary angles.