Answer:
50.26 in
Step-by-step explanation:
First you need the circumference of half of a circle.
Circumference = diameter x pi. The radius is 9, so the diameter is 18. 18 * 3.14 = 56.52. But you need half of that, so 56.52 / 2 = 28.26
Then add the other 3 sides
28.26 + 5 + 12 + 5 = 50.26
