How to Find the Circumference of an Octagon

Stop signs are in the shape of an octagon.
••• Jupiterimages/Photos.com/Getty Images

Most commonly associated with the shape of a "Stop" sign, the octagon has eight sides that are equal in length. The circumference of an octagon, also known as the perimeter, can be calculated by using a simple mathematical formula and a length measuring device such as a tape measure.

    Measure one side of the octagon using a tape measure. Because each side of the octagon should measure the same length, taking the measurement of one side should suffice for finding the circumference.

    Multiply the length you measured by 8 or simply add up all eight sides. The answer should be the same and give you the circumference of the octagon shape. For example, if one of the sides of the octagon measures 3 inches, the circumference of the octagon would be 24 inches -- 3 x 8 = 24 or 3 + 3 + 3 + 3 + 3 + 3 +3 + 3 = 24.

    Convert the unit value of the circumference to another length measurement unit, such as feet and meters. You can use an online length conversion tool or complete the conversion mathematically. For example, if the circumference of your octagon was 24 inches, it would equal 2 feet because there are 12 inches in each foot.

    Things You'll Need

    • Tape measure
    • Calculator

Related Articles

How Do You Calculate Inches Into Square Feet?
Happy Pi Day! 3 Simple Ways to Estimate Pi
How to Calculate the Perimeter of Quadrilaterals
How to Calculate Circumference in Inches
How to Calculate Sides of a Triangle
How to Find The Perimeter of a Square
How to Calculate Perimeter and Area Ratio
How to Figure the Cubic Yards in a Circle
How to Find the Perimeter of Different Shapes
How to Calculate Cubic Inches in a Cylinder
How to Find the Area of Squares
How to Calculate the Diameter of a Circle From a Linear...
How to Find the Perimeter of a Circle
How to Calculate a 3D Perimeter
How to Calculate the Perimeter of Combined Shapes and...
How to Calculate the Volume of Water to Fill a Rectangular...
How to Find the Perimeter of a Six-Sided Figure
How to Calculate the Radius From the Circumference
How to Find Dimensions in Geometric Shapes
How to Find the Length of the Sides of an Octagon Based...

Dont Go!

We Have More Great Sciencing Articles!