NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 5: Lines And Angles - Problems and SolutionsQuestion 79
Class 7 - Mathematics - Unit 5: Lines And Angles - Problems and Solutions
Question. 79
79. In Fig. 5.39, P, Q and R are collinear points and TQ ⟂ PR. Name:
(a) pair of complementary angles
(b) two pairs of supplementary angles
(c) four pairs of adjacent angles
Answer:
(a) ∠TQS, ∠SQR
(b) ∠SQR, ∠SQP; ∠TQR, ∠TQP
(c) ∠SQR, ∠SQT; ∠TQR, ∠TQP; ∠SQT, ∠TQP; ∠PQS, ∠SQR
Detailed Answer with Explanation:
Complementary pairs add up to 90°. Supplementary pairs add up to 180°. Adjacent pairs share a common vertex and side.