Answer:
Circumference of the semicircle[tex]=12.56 miles[/tex]
Step-by-step explanation:
Diameter of the semicircle= [tex]8 miles[/tex]
Radius of the semicircle=[tex]8/2=4 miles[/tex]
Perimeter of a circle or semicircle is called its Circumference:
Circumference of a circle= [tex]2*\pi *r[/tex]
Circumference of a semicircle= [tex]\frac{2*\pi *r}{2}=\pi *r[/tex]
As, [tex]\pi =\frac{22}{7}=3.14[/tex]
Putting the values in the formula of the circumference of the semicircle:
Circumference of the semicircle= [tex]3.14*4[/tex]
[tex]=12.56 miles[/tex]
The Circumference of the semicircle with the radius of 4 miles [tex]=12.56 miles[/tex]
