NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 5: Lines And Angles - Multiple Choice QuestionsQuestion 18
Class 7 - Mathematics - Unit 5: Lines And Angles - Multiple Choice Questions
Question. 18
The difference of two complementary angles is 30°. Then, the angles are
(a)
(a) 60°, 30°
(b)
(b) 70°, 40°
(c)
(c) 20°, 50°
(d)
(d) 105°, 75°
Detailed Answer with Explanation:
Let angles = x and y, x+y=90, x−y=30 ⇒ 2x=120 ⇒ x=60, y=30.