There are two identical figures with all sides of equal length. The combined perimeter of the figures is 80 centimeters. What is the length of one side?

The two figures are identical, so each has the same perimeter.

Combined perimeter = 80 cm.

$$\text{Perimeter of one figure} = \frac{80 \text{ cm}}{2} = 40 \text{ cm}$$

From the figure, one figure has 5 sides, all of equal length.

Let $s$ be the length of one side in cm.

$$\text{Perimeter of one figure} = 5s = 40 \text{ cm}$$

$$s = \frac{40 \text{ cm}}{5} = 8 \text{ cm}$$

The length of one side is 8 cm.

8 cm