Find the perimeter of :
a triangle having sides of lenghts 5.5 cm , 6 cm and 6.5 cm.

Answer

To find the perimeter of a triangle with sides of lengths 5.5 cm, 6 cm, and 6.5 cm, we can follow these steps:

### Step 1: Identify the lengths of the sides
Let the sides of the triangle be:
- AB = 5.5 cm
- BC = 6 cm
- AC = 6.5 cm

### Step 2: Write the formula for the perimeter of a triangle
The perimeter (P) of a triangle is calculated by adding the lengths of all three sides. The formula is:
\[ P = AB + BC + AC \]

### Step 3: Substitute the values into the formula
Now, substitute the values of the sides into the formula:
\[ P = 5.5 \, \text{cm} + 6 \, \text{cm} + 6.5 \, \text{cm} \]

### Step 4: Perform the addition
Now, we will add the lengths together:
\[ P = 5.5 + 6 + 6.5 \]

Calculating this step-by-step:
1. First, add 5.5 cm and 6 cm:
\[ 5.5 + 6 = 11.5 \, \text{cm} \]
2. Now, add 6.5 cm to the result:
\[ 11.5 + 6.5 = 18 \, \text{cm} \]

### Step 5: State the final answer
Thus, the perimeter of the triangle is:
\[ P = 18 \, \text{cm} \]

---