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The perimeter of a semicircular protractor whose radius is ‘r’ is

(a) π + 2r   (b) π + r   (c) πr   (d) πr + 2r

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Question 21 The perimeter of a semicircular protractor whose radius is ‘r’ is (a) π + 2r (b) π + r (c) πr (d) πr + 2r Perimeter of semicircle = Circumference of semicircle + Diameter AB = 𝟏/𝟐 × 2𝜋r + 2r = 𝜋r + 2r So, the correct answer is (d)

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.