NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 5: Lines And Angles - Multiple Choice QuestionsQuestion 34
Class 7 - Mathematics - Unit 5: Lines And Angles - Multiple Choice Questions
Question. 34
If an angle is 60° less than two times of its supplement, then the greater angle is
(a)
(a) 100°
(b)
(b) 80°
(c)
(c) 60°
(d)
(d) 120°
Detailed Answer with Explanation:
Let angle = x, supplement = 180 − x.
Given: x = 2(180 − x) − 60 ⇒ x = 360 − 2x − 60 ⇒ 3x=300 ⇒ x=100°.
So greater angle = 100°.