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

Question 14

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.