NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 5: Lines And Angles - Multiple Choice QuestionsQuestion 22
Class 7 - Mathematics - Unit 5: Lines And Angles - Multiple Choice Questions
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°.