NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 5: Lines And Angles - Multiple Choice QuestionsQuestion 21
Class 7 - Mathematics - Unit 5: Lines And Angles - Multiple Choice Questions
Question. 21
If two supplementary angles are in the ratio 1:2, then the bigger angle is
(a)
(a) 120°
(b)
(b) 125°
(c)
(c) 110°
(d)
(d) 90°
Detailed Answer with Explanation:
Let angles be x and 2x. x+2x=180 ⇒ 3x=180 ⇒ x=60 ⇒ bigger=120°.