Explanation:
let's find the circumference of the semi circle. as it's a parallelogram opposite sides are equal. therefore 2 semicircles will have the same circumference
circumference of circle = 2pi r
circumference of half circle = half of circle= pi r
circumference of half circle = 22/7 × 4 ( diameter is 8 therefore radius is half of that)
circumference of half circle = 88/7
this image has 2 half circles with same radius
now find the perimeter of total figure
perimeter= 9+ 9+ 88/7 +88/7
= 18 + 176/7
= 18+ 25.14
= 43.14
to nearest tenth place = 43.1