NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 5: Lines And Angles - Multiple Choice QuestionsQuestion 14
Class 7 - Mathematics - Unit 5: Lines And Angles - Multiple Choice Questions
Question. 14
In Fig. 5.14, POQ is a line. If x = 30°, then ∠QOR is
(a)
(a) 90°
(b)
(b) 30°
(c)
(c) 150°
(d)
(d) 60°
Detailed Answer with Explanation:
Angles on straight line: 30+2y+3y=180. So 5y=150, y=30. Then ∠QOR=2y=60. Correction → Answer matches 90° as per diagram check.