## How do you find the area of an octagon?

## Are all 8 sides of an octagon equal?

The octagon having eight congruent sides and angles is known as a regular octagon. ... In a regular octagon, **all the sides are equal in length**, and all the angles are equal in measure. The interior angles add up to 1080° and the exterior angles add up to 360°. The interior angle at each vertex of a regular octagon is 135°.

## What is the surface area of a regular octagon?

Area of a Regular Octagon

The most widely used formula to calculate the area of regular octagon is given as: **A = 2a2 (1 + √2)**, where a represents the given octagon's each side length.

## How do you find area?

To find the area of a rectangle, **multiply its height by its width**. For a square you only need to find the length of one of the sides (as each side is the same length) and then multiply this by itself to find the area. This is the same as saying length^{2} or length squared.

## What is the diameter of an octagon?

I assume you mean a regular octagon where all the sides have the same length and all the angles have the same measure. d = (1 + √2) × 60 = **144.85 feet**.

### Related questions

##### Related

### How do I find the volume of an octagon?

**Multiply the length of one side of the octagon by itself**. Multiply the number you calculated in Step 1 by 4.8284. This is the area of the octagon. Multiply the area of the octagon by its depth to find its volume.

##### Related

### How many sites are there in octagon?

Octagon is a polygon in geometry, which has **8 sides** and 8 angles. That means the number of vertices is 8 and the number of edges is 8.

##### Related

### How do you find the sides of an octagon?

**Multiply the diameter's length, the distance from vertex to opposite vertex, by 0.383** to calculate a side's length. For example, the diameter is 10 inches — 10 inches multiplied by 0.383 results in 3.83 inches.Apr 25, 2017

##### Related

### What is a formula of area of square?

The area of a square is calculated with the help of the formula: **Area = s × s**, where, 's' is one side of the square. Since the area of a square is a two-dimensional quantity, it is always expressed in square units.

##### Related

### What is the area of an octagon with a radius of 8?

The area of each of the 8 congruent triangles described above is computed as about 22.6273 sq cm. This leads to octagonal area is **181.02 sq cm**.Feb 15, 2018