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Find the perimeter of each semicircle given its radius or diameter. (Round your answers to two decimal places.)

 

(a) d = 11 mm

_____  mm 

(b) r = 3 ft


 ______ ft 

(c) 8 m
 _____ m 

(d) 13.5 in

______ in

 Sep 4, 2018
 #1
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a)      Perimeter   =  pi * r   =  pi * (d /2)    = pi  * (11/2)  =  11pi / 2 mm ≈ 17.28  mm

 

b)      Perimeter  =  pi * r   =  pi ( 3)   =  3 pi   ft  ≈  9.42 ft

 

On c and d   ...you don't specify if these are  diameters or radii

 

 

cool cool cool

 Sep 4, 2018
edited by CPhill  Sep 4, 2018
 #2
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This is C and D 

Guest Sep 4, 2018

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