The area would be 32*pi miles squared. The perimeter would be 16*pi miles.
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it is the diameter
semicircle
Perimeter of a semicircle is the length of the half-circle plus the diameter. The whole circle would have a length of diameter times pi, but since it's only half... Perimeter of semicircle = (1/2*pi*D) + D
This distance is called the diameter.
2328.31286 cm2