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

Question 27

Question.  27

In Fig. 5.23, if QP ∥ SR, the value of a is

(a)

(a) 40°

(b)

(b) 30°

(c)

(c) 90°

(d)

(d) 80°

Detailed Answer with Explanation:

Angles 60+30=90, so a=90°.