# What is a polygon? | Area of Triangle in java

Contents

## What is a polygon?

A polygon is any 2-dimensional shape formed with straight lines. Triangles, quadrilateral, pentagon, and hexagon are all examples of polygons.
A regular polygon is a polygon in which all sides of the polygon are of equal length. We have a mathematical formula so that the area of ​​a regular polygon can be calculated. Area = (ln * ln * n / 4 * (tan (180 / n)) Where ln = Length of the edge of the polygon Number of sides in a polygon = tan = touch function in degrees

## Java Program to Print the Area of Triangle

```import java.io.*;
import java.util.*;

public class Triangle{

public static void main(String []args)
{
Scanner ob=new Scanner(System.in);
int l,h;
System.out.println("Enter the length of Traingle: ");
l=ob.nextInt();
System.out.println("Enter the height of Traingle: ");
h=ob.nextInt();

double t=0.5*l*h;
System.out.println("Area of Triangle: "+t);

}
}```

### Output:

```PS C:\Users\Pramod\Desktop\MPS>  c:; cd 'c:\Users\Pramod\Desktop\MPS'; & 'c:\Users\Pramod\.vscode\extensions\vscjava.vscode-java-debug-0.31.0\scripts\launcher.bat' 'C:\Program Files\Java\jdk-15.0.2\bin\java.exe' '--enable-preview' '-XX:+ShowCodeDetailsInExceptionMessages' '-Dfile.encoding=UTF-8' '-cp' 'C:\Users\Pramod\AppData\Roaming\Code\User\workspaceStorage\68adb333e7c4b36a52ea53bc8c24e1ec\redhat.java\jdt_ws\MPS_776f50d0\bin' 'Traingle'
Enter the length of Traingle:
45
Enter the height of Traingle:
12
Area of Triangle: 270.0
PS C:\Users\Pramod\Desktop\MPS>```

Hi, I’m Pramod Kumar Yadav & a computer science Engineer with 3years of experience in Digital marketing. I’m self-motivated and love to do SEO.

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