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Class 7 - Mathematics - Unit 5: Lines And Angles - Multiple Choice QuestionsQuestion 36
Class 7 - Mathematics - Unit 5: Lines And Angles - Multiple Choice Questions
Question. 36
In Fig. 5.29, PQ ∥ RS and a : b = 3 : 2. Then f is equal to
(a)
(a) 36°
(b)
(b) 108°
(c)
(c) 72°
(d)
(d) 144°
Detailed Answer with Explanation:
a:b=3:2. So let a=3k, b=2k. Then a+b=180 ⇒ 5k=180 ⇒ k=36. So a=108, b=72. f corresponds to a =108°.