Explanation:
1) The perimeter of a square is found by multiplying the length of one side by 4. So, the perimeter of each square is 4s.
2) The curved part is half the circumference of a circle with radius "r". The straight part is the diameter of the semicircle, which is equal to the side length of the square. So, the perimeter of each semicircle is (πr + s).
3) Since we have 3 squares and 2 semicircles, we add up the perimeters of all the shapes. The total perimeter of the shape is the sum of the perimeters of the squares and the perimeters of the semicircles.
4) The perimeter of each square is 4s, which is 4 * 2 = 8.
The perimeter of each semicircle is (πr + s), which is (π * 1 + 2) = (π + 2).
So, the total perimeter of the shape is 3 * 8 + 2 * (π + 2).
5) Multiply 3 by 8 to get 24. Multiply 2 by (π + 2) to get 2π + 4. Therefore, the total perimeter of the shape is 24 + 2π + 4.
6) Final answer: The perimeter of the shape composed of 3 squares and 2 semicircles is 28 + 2π, where π is approximately equal to 3.14.