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

Question 16

Question.  16

In Fig. 5.15, the value of y is

(a)

(a) 30°

(b)

(b) 15°

(c)

(c) 20°

(d)

(d) 22.5°

Detailed Answer with Explanation:

Angles on straight line: 6y+2y+y = 180 ⇒ 9y=180 ⇒ y=20°.