We hope it’s effective! Always feel free to revisit this page if you ever have any questions about the perimeter of a rectangle. TIP: Check the answer by plugging all figures into the formula. Therefore, the length of a rectangle with 25cm perimeter and 5cm width is 7.5cm. Simplify first by multiply 2 times the width (w = 5cm).Ĭontinue by subtracting 10cm from both sides of the equation.ĭivide both sides of the equation by 2 to find the length. Substitute 5cm for W and 25cm for P in the formula. Start by writing down the given figures, the width (W = 5cm) and perimeter (P = 25cm). Example 2: Finding the Length when given Width and Perimeter of a Rectangleįind the length of the rectangle below. Therefore, the perimeter of the rectangle is 36cm. For P 2 (l +w), add the length and the width together and multiply by 2. There are two ways to solve the equation depending on which formula you have used. Using the length and width you just measured, plug them into the formula to solve for the perimeter. Substitute 10cm for L and 8cm for W in the formula. Plug in the variables and solve the equation. Start by writing down the given figures, the length (L = 10cm) and width (W = 8cm). Example 1: Finding the Perimeter when given Length and Width of a Rectangleįind the perimeter of the rectangle below. Don’t forget to write the measurement unit together with the answer. ![]() Perform the operations: multiplication then addition. Plug the figures into the formula: P = 2L + 2W. If not, convert either of them to match the unit of the other. Make sure all measurement units are the same. Where L = Length and W = Width Here’s a quick guide to computing perimeters: Whether youre just starting out, need a quick refresher, or here to master your math skills, this is the place for s. ![]() To find the perimeter of a rectangle, add up the lengths of its four sides, as expressed in this formula: Perimeter refers to the total length around a shape. Related Reading: Area of a Rectangle – Formula & Examples How to Find the Perimeter of a Rectangle: Examples of a rectangle are mobile phones, chalkboard, and TV. ![]() By this definition, we can infer that a square is a rectangle, but a rectangle is not a square. For a rectangle, that means adding four sides: Pa+b+c+d P a + b + c + d. A rectangle is also called a parallelogram – a quadrilateral whose opposite sides are equal and parallel. To calculate perimeter of a polygon, add up the lengths of all the straight sides. For a square or pentagon, its even easier - you can multiply the length of one side by the number of sides to get the total perimeter. What is a Rectangle?Ī rectangle is a four-sided flat shape with two pairs of parallel and congruent lines that form a right angle on each of the four sides. To find the perimeter of a shape, you add up the lengths of all the sides. Let’s learn how to determine the perimeter of a rectangle.
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