The perimeter of a regular pentagon is 250 cm. How long is its each side ?

Answer

To find the length of each side of a regular pentagon when the perimeter is given, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Perimeter of a Regular Pentagon**:
The perimeter (P) of a regular pentagon is calculated using the formula:
\[ P = 5 \times \text{side} \]
where "side" represents the length of one side of the pentagon.

2. **Identify the Given Perimeter**:
According to the problem, the perimeter of the pentagon is given as:
\[ P = 250 \, \text{cm} \]

3. **Set Up the Equation**:
Using the formula for the perimeter, we can set up the equation:
\[ 5 \times \text{side} = 250 \, \text{cm} \]

4. **Solve for the Length of One Side**:
To find the length of one side, divide both sides of the equation by 5:
\[ \text{side} = \frac{250 \, \text{cm}}{5} \]

5. **Calculate the Value**:
Performing the division:
\[ \text{side} = 50 \, \text{cm} \]

6. **Conclusion**:
Therefore, the length of each side of the regular pentagon is:
\[ \text{side} = 50 \, \text{cm} \]

### Final Answer:
Each side of the regular pentagon is **50 cm**.