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 A circle has a radius of 12.6 cm 

 What is the exact length of an arc formed by a central angle measuring 120°? 

 Express your answer using π

jj88778  Mar 6, 2018
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2+0 Answers

 #1
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Answered here :

 

https://web2.0calc.com/questions/help_82215

 

 

cool cool cool

CPhill  Mar 6, 2018
 #2
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Circumference = pi * d    or    pi * 2 r

 

pi * 2 * 12.6 = pi 25.2

We are looking for the fraction of the circumference that 120 out of 360 dgrees covers

 

120 /360  *  pi 25.2 =   25.2 pi / 3

ElectricPavlov  Mar 6, 2018

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