Calculators, Formulas and Work with Steps -
Calculate :

Side :

Area :

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Octagon (Area, Perimeter & Side) Calculator's octagon calculator is an online basic geometry tool to calculate area, perimeter & side of a octagonal shaped polygon, in both US customary & metric (SI) units.

Steps to Find Area of a Octagon

The step by step workout for how to find what is the area of a octagon. Students may use this octagon calculator to generate work with steps for any other similar input values.Workout :
step1 Address the formula, input parameters and values
side = 10 in

step 2 Find Area of Octagon using side value
Area A = 2 (1 + 2 ) s²
= 2 x (1 + 2 ) x (10)² in²
= 2 x (1 + 1.4142 ) x 100 in²
= 2 x 2.4142 x 100 in²
Area A = 482.8427 in²

Octagon & Formulas

Octagon is a polygon with eight straight sides and angles, a geometric shape on the two dimensional plane. K-12 students may refer the below formulas to know what are all the input parameters are being used to find the area, perimeter & side of octagon.

octagon area, perimeter & side formula
Octagon formulas to calculate area, perimeter & side

Problems on Finding the Area & Perimeter of Octagon

Below are the practice problems for grade school students, on finding what is the area, side and perimeter of a octagon. By click on the corresponding problem shows the step-by-step calculation or work with steps for how to find such values of octagon mathematically. For any other similar values, use this octagon calculator to verify the results.
Calculators and Calculations