Two semi circles make one whole circle.
The diameter if the circle is given to be 32. That means the radius is 16.
The distance around the shape is then the circumference of the circle plus the side distance which is the total length 54 minus 16 on both sides.
p = 2(pi)16 + 2(54 - 32)
p = 32(pi) + 44
p = 32(3.14) + 44
p = 100.48 + 44
p = 144.48
