**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>

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