Perimeter of a Rectangle Calculator

This Perimeter of a Rectangle Calculator helps you find the total distance around a rectangle when the width and length are known. It uses the formula P = 2(w + l), where w is the width, l is the length, and the answer is written in units. Add the width and length, then multiply by 2 to get the perimeter. It is a simple way to check answers, understand the rectangle perimeter formula, and practise basic geometry step by step.

In the diagram, the width is w and the length is l.

Step-by-step method

1. Identify what is given.
2. Write the formula.
3. Substitute the values and calculate the perimeter.

Formula:

Example 1: w = 4, l = 6

Step 1 - Identify what is given.

In this problem: The given dimensions are w = 4 and l = 6.

Step 2 - Write the formula.

In this problem: Use the rectangle perimeter formula: P = 2(l + w).

Step 3 - Substitute the values and calculate the perimeter.

In this problem: Substitute l = 6 and w = 4: P = 2(6 + 4) = 2(10) = 20.

Final answer: P = 20

Example 2: w = 3.5, l = 2

Step 1 - Identify what is given.

In this problem: The given dimensions are w = 3.5 and l = 2.

Step 2 - Write the formula.

In this problem: Use the rectangle perimeter formula: P = 2(l + w).

Step 3 - Substitute the values and calculate the perimeter.

In this problem: Substitute l = 2 and w = 3.5: P = 2(2 + 3.5) = 2(5.5) = 11.

Final answer: P = 11