If the side of an equilateral triangle is 6 cm, then its perimeter is

Options

A. 12 cm
B. 18 cm
C. 27 cm
D. 36 cm

Answer

To find the perimeter of an equilateral triangle with a side length of 6 cm, follow these steps:

### Step-by-Step Solution:

1. **Understand the properties of an equilateral triangle**:
An equilateral triangle has all three sides equal in length.

2. **Identify the length of one side**:
Given that the length of each side of the triangle is 6 cm.

3. **Calculate the perimeter**:
The perimeter (P) of a triangle is the sum of the lengths of all its sides.
For an equilateral triangle, the formula for the perimeter is:
\[ P = 3 \times \text{side length} \]
Substituting the given side length:
\[ P = 3 \times 6 \, \text{cm} \]

4. **Perform the multiplication**:
\[ P = 18 \, \text{cm} \]

5. **State the final answer**:
The perimeter of the equilateral triangle is 18 cm.