5-1. A square with a side of 100 was cut into two equal rectangles. They were placed next to each other as shown in the figure. Find the perimeter of the resulting figure.

![](https://cdn.mathpix.com/cropped/2024_05_06_9cd52224ba9edadf4a1fg-04.jpg?height=277&width=594&top_left_y=684&top_left_x=731)
Answer: 500.

Solution. The perimeter of the figure consists of 3 segments of length 100 and 4 segments of length 50. Therefore, the length of the perimeter is

$$
3 \cdot 100 + 4 \cdot 50 = 500
$$