perimiter is the distance around it
it can be split up into a rectangle and a semicircle
find the perimiter around the ractangle then the semicircle
so 2 sides are showing and 1 base so 3+3+6=12
rectangle total (not including part covered by semicircle because you don't include it) is 12
then semicircle
circumference=2 times pi times radius
2 times radius=diameter
diameter=6 because the base is 6 and that lines up with the diameter
so circumference=6 times pi
c=6pi
add
12+6pi=answer
the answer is 12+6π
(if you aprox pi to 3.14 then you would get an answer of 30.84)