103 LearnersLast updated on June 24th, 2025
Perimeter Of Polygon Calculator
A calculator is a tool designed to perform both basic arithmetic operations and advanced calculations, such as those involving geometry. It is especially helpful for completing mathematical school projects or exploring complex mathematical concepts. In this topic, we will discuss the Perimeter Of Polygon Calculator.
What is the Perimeter Of Polygon Calculator
The Perimeter Of Polygon Calculator is a tool designed for calculating the perimeter of a polygon. A polygon is a two-dimensional shape with straight sides. The perimeter is the total distance around the edges of the polygon. The word polygon comes from the Greek word "poly," meaning "many," and "gonia," meaning "angle."
How to Use the Perimeter Of Polygon Calculator
For calculating the perimeter of a polygon, using the calculator, we need to follow the steps below - Step 1: Input: Enter the lengths of all sides Step 2: Click: Calculate Perimeter. By doing so, the lengths we have given as input will get processed Step 3: You will see the perimeter of the polygon in the output column
Tips and Tricks for Using the Perimeter Of Polygon Calculator
Mentioned below are some tips to help you get the right answer using the Perimeter Of Polygon Calculator. Know the formula: The formula for the perimeter of a polygon is the sum of the lengths of all its sides. Use the Right Units: Make sure the side lengths are in the right units, like centimeters or meters. The answer will be in linear units (like centimeters or meters), so it’s important to match them. Enter correct Numbers: When entering the side lengths, make sure the numbers are accurate. Small mistakes can lead to big differences, especially with larger numbers.
Common Mistakes and How to Avoid Them When Using the Perimeter Of Polygon Calculator
Calculators mostly help us with quick solutions. For calculating complex math questions, students must know the intricate features of a calculator. Given below are some common mistakes and solutions to tackle these mistakes.
Mistake 1
Rounding off too soon
Rounding the decimal number too soon can lead to wrong results. For example, if the perimeter is 15.67 cm, don’t round it to 16 right away. Finish the calculation first.
Mistake 2
Entering the wrong number as the side length
Make sure to double-check the numbers you are going to enter as the side lengths. If one side is entered as ‘6’ instead of 7, the result will be incorrect.
Mistake 3
Mixing up units
Ensure that all side lengths are in the same units before calculating the perimeter. Mixing units like meters and centimeters will give the wrong result.
Mistake 4
Relying too much on the calculator
The calculator gives an estimate. Real objects may not be perfect, so the answer might be slightly different. Keep in mind that it's an approximation.
Mistake 5
Mixing up positive and negative signs
Always check that you’ve entered the correct positive (+) or negative (–) signs. A small mistake, like using the wrong sign for the length, can completely change the result. Make sure the signs are correct before finishing your calculation. For example, if a side is 29 cm, entering -29 cm instead of +29 cm could give you an incorrect perimeter.
Perimeter Of Polygon Calculator Examples
Problem 1
Help William find the perimeter of a hexagonal garden if each side is 9 cm.
We find the perimeter of the hexagonal garden to be 54 cm.
Explanation
To find the perimeter, we use the formula: Perimeter = sum of all side lengths Here, each side length is given as 9 So, Perimeter = 6 × 9 = 54 cm
Problem 2
The sides of a quadrilateral are 5 cm, 12 cm, 7 cm, and 10 cm. What will be its perimeter?
The perimeter is 34 cm.
Explanation
To find the perimeter, we use the formula: Perimeter = sum of all side lengths Since the sides are given as 5, 12, 7, and 10, we can find the perimeter as Perimeter = 5 + 12 + 7 + 10 = 34 cm
Problem 3
Find the perimeter of a triangle with side lengths 8 cm, 5 cm, and 6 cm. After finding the perimeter of the triangle, calculate the perimeter of a rectangle with a length of 10 cm and width of 4 cm, and take their sum.
We will get the sum as 50 cm.
Explanation
For the perimeter of a triangle, we use the formula ‘sum of all side lengths’, and for the rectangle, we use ‘2 × (length + width)’. Perimeter of triangle = 8 + 5 + 6 = 19 cm Perimeter of rectangle = 2 × (10 + 4) = 2 × 14 = 28 cm The sum of perimeters = perimeter of triangle + perimeter of rectangle = 19 + 28 = 50 cm.
Problem 4
The sides of a pentagon are 4 cm, 8 cm, 6 cm, 7 cm, and 5 cm. Find its perimeter.
We find the perimeter of the pentagon to be 30 cm.
Explanation
Perimeter = sum of all side lengths = 4 + 8 + 6 + 7 + 5 = 30 cm
Problem 5
John wants to set up a rectangular fence. If the length of the fence is 30 cm and the width is 20 cm, help John find its perimeter.
The perimeter of the rectangular fence is 100 cm.
Explanation
Perimeter of a rectangle = 2 × (length + width) = 2 × (30 + 20) = 2 × 50 = 100 cm
FAQs on Using the Perimeter Of Polygon Calculator
1.What is the perimeter of a polygon?
2.What should be entered if one side length is 0?
3.What will be the perimeter of a square if one side length is given as 3?
4.What units are used to represent the perimeter?
5.Can we use this calculator to find the area of a polygon?
Important Glossary for the Perimeter Of Polygon Calculator
Perimeter: It is the total distance around the edges of a polygon. It is measured in linear units like meters (m) or centimeters (cm). Polygon: A two-dimensional shape with straight sides. Examples include triangles, rectangles, pentagons, etc. Side Length: The length of one side of a polygon. It is a key component in calculating the perimeter. Unit: A standard measurement for length, such as centimeters (cm) or meters (m). Sum: The result of adding numbers together, used here to refer to adding the side lengths to find the perimeter.
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Seyed Ali Fathima S
About the Author
Seyed Ali Fathima S a math expert with nearly 5 years of experience as a math teacher. From an engineer to a math teacher, shows her passion for math and teaching. She is a calculator queen, who loves tables and she turns tables to puzzles and songs.
Fun Fact
: She has songs for each table which helps her to remember the tables
