Answer:
67.7
Step-by-step explanation:
The long sides contribute a total of 30 , while the two half semi-circumferences contribute pi * 12 giving a total of:
67.699 which rounded to the nearest tenth is:
perimeter = semicircle (x2) + parallelogram side (x2)
= 1/2 π 12 (x2) + 15 (x2)
= 37.7 + 30
= 67.7
