Answer:
![P = 8\pi](https://img.qammunity.org/2023/formulas/mathematics/college/yk7e82ewyenazx0brjrhqh0bks34em1hrj.png)
Explanation:
To solve this problem, we must calculate the circumference of one circle and multiply it by two because there are 2 circles (4 halves), that make up the perimeter.
We know the diameter is 4m, thus, the circumference of one circle (two halves) is:
![C_1 = \pi d\\C_1 = \pi 4](https://img.qammunity.org/2023/formulas/mathematics/college/3rfsomr74d7qomceae4756ozwed7lyiydw.png)
To get the total perimeter (circumference) multiply the result by 2:
![C = C * 2\\C = 4\pi * 2\\C = 8\pi](https://img.qammunity.org/2023/formulas/mathematics/college/9gpbkudfpazvrmj91mkpohcthfay1aw76j.png)