please help me if you can??

The perimeter of a circle is finding the circumference of the circle
--> calculated by the equation: [tex]\pi D = 2\pi R[/tex]
A semicircle has half of the circumference of the circle, thus the circumference equation is
--> [tex]\frac{1}{2} \pi D = \frac{1}{2} *2*\pi *r[/tex]
We are given:
Now let's calculate
[tex]\frac{1}{2} *3.14*17 = 26.69 in^2[/tex]
Hope it helps!