RS Aggarwal - Mathematics

Book: RS Aggarwal - Mathematics

Chapter: 18. Area of Circle, Sector and Segment

Subject: Maths - Class 10th

Q. No. 9 of Exercise 18A

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9

Find the perimeter of a semicircular protractor whose diameter is 14 cm.

Given:

Diameter of the semicircular protractor = 14 cm


Radius of the protractor = cm = 7 cm


Perimeter of semicircle = πr + d


Perimeter of semicircular protractor = × 7 + 14 = 22 + 14


= 36 cm


Hence, the perimeter of the semicircular protractor is 36 cm.


9

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