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
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
This is C and D
