Given:
There are given that the diameter of the semicircle is 36.6mm.
Step-by-step explanation:
To find the perimeter, first, we need to find the value of radius r.
So,
From the formula:

Now,
From the formula of the perimeter of the semicircle:

Then,
Put the values into the above formula:
So,

Final answer:
Hence, the value of the perimeter is shown below:
