Answer:
22.28
Explanation:
Since you know the diameter of the semi circle which is 4 because the shape is a parallelogram, you find the circumference of the circle and divide it by two because we only need to know wheat half of the circumference is. When you do this you end up with the answer 6.28. Then you add the lengths of the parallelogram to 6.28, disregarding the circumference of the circle which isn't part of the perimeter. Doing this is 6.28+6+4+6 which equals 22.28 units.