Find the perimeter of an equilateral triangle of side 13 cm.

Answer

To find the perimeter of an equilateral triangle with a side length of 13 cm, follow these steps:

### Step 1: Understand the formula for the perimeter of an equilateral triangle.
The perimeter \( P \) of an equilateral triangle can be calculated using the formula:
\[ P = 3 \times \text{side} \]

### Step 2: Identify the length of the side.
In this problem, the length of each side of the equilateral triangle is given as 13 cm.

### Step 3: Substitute the side length into the formula.
Now, substitute the value of the side into the perimeter formula:
\[ P = 3 \times 13 \, \text{cm} \]

### Step 4: Perform the multiplication.
Calculate the value:
\[ P = 39 \, \text{cm} \]

### Step 5: State the final answer.
Thus, the perimeter of the equilateral triangle is:
\[ \text{Perimeter} = 39 \, \text{cm} \]

---