NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 5: Lines And Angles - Multiple Choice Questions

Question 22

Question.  22

In Fig. 5.19, ∠ROS is a right angle and ∠POR and ∠QOS are in the ratio 1:5. Then, ∠QOS measures

(a)

(a) 150°

(b)

(b) 75°

(c)

(c) 45°

(d)

(d) 60°

Detailed Answer with Explanation:

∠POR+∠QOS=90. Ratio 1:5 ⇒ total parts=6. So ∠QOS=5×15=75°.