# 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>```

Pramod Kumar Yadav is from Janakpur Dham, Nepal. He was born on December 23, 1994, and has one elder brother and two elder sisters. He completed his education at various schools and colleges in Nepal and completed a degree in Computer Science Engineering from MITS in Andhra Pradesh, India. Pramod has worked as the owner of RC Educational Foundation Pvt Ltd, a teacher, and an Educational Consultant, and is currently working as an Engineer and Digital Marketer.