# Irregular Polygon Definition

In **Geometry**, all closed 2D shapes (except **circles**) are called **Irregular Polygons** if they don’t have **equal sides** and measures of **angles**. It means an **irregular** polygon is a **shape** that has **sides** and **angles** of **different** measures.

**Note:**

Read about Geometry and **Angles** here.

**Table of Contents**

## Examples of irregular polygons

### What is the opposite of an irregular polygon?

Like an irregular polygon, there is another specific term used for the **shapes** opposite to them which is **Regular polygon**. In this type of **polygon**, the **lengths** of all **sides** and **measures** of all **angles** are the **same**

**Note:**

Read about Regular Polygons here.

### How to identify if a polygon is regular or irregular?

To check if a polygon can be termed an **irregular polygon** or not, you need to perform two checks i.e. **length** and** angle** measurements. If the lengths of all **sides** or measures of all **angles** are not the **same**, it means the **polygon** is **irregular**. Otherwise, the polygon will be regular which means the same, proper, and regulated.

### Can we solve an irregular polygon?

Yes, like all other closed shapes like a **circle**, **square**, **triangle**, and **rectangle**, we can solve an irregular polygon. We can find the **Area** of an irregular polygon and the **Perimeter** of the given irregular polygon.

The **formula** and **method** to calculate depending on the number of **sides**, **angles**, and **shape** of the polygon.

### Types of irregular polygons

Depending on the shapes of the polygons, there are two major types of polygons. Let us show you those types here briefly.

**Concave irregular polygon:**If an**irregular polygon**has one**interior****angle**of measure more than**180 degrees**, it will be called a**Concave irregular polygon**.**Convex irregular polygon:**If the**measure**of all**interior**angles of an**irregular polygon**is less than**180**degrees, it will be called a**Convex irregular polygon**.

### FAQ's

**What is an irregular polygon**

All those polygons that have sides and angles of different measures will be called irregular polygons.

**Can we find the area of an irregular polygon?**

Yes, we can find the Area and Perimeter of an irregular polygon using a specific formula depending on its shape and angles.

**What are the conditions to check the irregularity of a polygon?**

If a polygon fulfills the following conditions, it will be called an irregular polygon.

- Different lengths of all sides
- Different measures of angles

**What is the main difference between regular and irregular polygons?**

The major difference between a regular and irregular polygon is the different lengths of sides and measures of angles.

**Name three common examples of irregular polygons.**

- Scalene triangle
- Isosceles triangle
- Rectangle