Im pretty sure it is b hope this helps
My photo math is saying 59 degrees hope that helps
Answer:
The perimeter of a semicircle is the sum of the half of the circumference of the circle and diameter. As the perimeter of a circle is 2πr or πd. So, the perimeter of a semicircle is 1/2 (πd) + d or πr + 2r, where r is the radius.
I believe it is 56.55 inches I could be wrong but I tried my best
