# How to Find the Area of an Octadecagon?

An octadecagon is an 18-sided polygon. The area of an octadecagon can be calculated by the equation for regular polygon area, which is 1/4 * number of sides * one side's measurement squared * cotan... Read More »

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## How to Find the Area of a Semicircle?

A semicircle is half a circle. They can appear on all types of math tests and in all types of math questions, and most of the time, the area will be very useful in solving a problem involving this ... Read More »
http://www.wikihow.com/Find-the-Area-of-a-Semicircle

## How to Find the Area of a Roundabout?

A roundabout is a type of intersection that is circular in nature with an "island" of land in the middle. Roundabouts are supposed to increase traffic capacity when compared to traditional intersec... Read More »

## How to Find the Area of a Shape?

Here is how to calculate the area of a regular shape (square and rectangle only) and a irregular shape. 1. is the square and rectangle and 2. is the irregular
http://www.wikihow.com/Find-the-Area-of-a-Shape

## How to Find the Area of a Square?

Find the area of a square is a common math problem. Read on to learn how to do this.
http://www.wikihow.com/Find-the-Area-of-a-Square

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