Let us consider a semicircle ABC

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Perimeter of semicircle will be the distance around it

Perimeter of Semicircle - Part 2

So,

  Perimeter of semicircle = ๐œ‹r + 2 r

 = r(๐œ‹ + 2)

Let us take an example:

 

 

Find perimeter of a semicircle with radius of  2 cm

Perimeter of Semicircle - Part 3

Radius = r

    = 2 cm

 

Perimeter of semicircle = r (๐œ‹ + 2)

       = 2 (3.14 + 2)

       = 2 (314/100+2)

       = 2 ((314 +  2 × 100)/100)

       = 2 ((314 + 200)/100)

       = 2 (514/100)

       = 1028/100  = 10.28 cm

 

 

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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.