Java Program to find Area of a Right Angled Triangle

In this article we will show you, How to write Java Program to find Area of a Right Angled Triangle with example. Before we step into the program, Let see the definition and formula behind the Area of a Right Angled Triangle

Area of a Right Angled Triangle

• If we know the width and height then, we can calculate the area of a right angled triangle using below formula. Area = (1/2) * width * height
• Using Pythagoras formula we can easily find the unknown sides in the right angled triangle. c² = a² + b²
• Perimeter is the distance around the edges. We can calculate perimeter using below formula. Perimeter = a + b+ c

Java Program to find Area of a Right Angled Triangle Example

This Java program allows the user to enter width and height of the right angled triangle. Using those values we will calculate the Area and perimeter of the right angled triangle.

JAVA CODE

// Java Program to find Area of a Right Angled Triangle Example 

package Area;

import java.util.Scanner;

public class AreaOfRightTriangle {
	private static Scanner sc;

	public static void main(String[] args) {
		double width, height, c, Area, Perimeter; 
		sc = new Scanner(System.in);
		
		System.out.println("\n Please Enter the Width of a Right Angled Triangle: ");
		width = sc.nextDouble();
		System.out.println("\n Please Enter the Height of a Right Angled Triangle: ");
		height = sc.nextDouble();

		Area = 0.5 * width * height;
		c = Math.sqrt((width * width) + (height * height));
		Perimeter = width + height + c;

		System.out.format("\n The Area of a Right Angled Triangle = %.2f\n",Area);
		System.out.format("\n The Other side of a Right Angled Triangle is: %.2f\n",c);
		System.out.format("\n The Perimeter of a Right Angled Triangle = %.2f\n", Perimeter);
	}
}

OUTPUT

ANALYSIS

Following statements will allow the User to enter the Width and Height of a right angled triangle and assign those values to corresponding variables.

System.out.println("\n Please Enter the Width of a Right Angled Triangle: ");
width = sc.nextDouble();
System.out.println("\n Please Enter the Height of a Right Angled Triangle: ");
height = sc.nextDouble();

Next, we are calculating the area of a right angled triangle. The value of 1/2 = 0.5) So, we used 0.5 * width * height as the formula

Area = 0.5 * width * height;

In the next line, We are calculating the other side of a right angled triangle using the Pythagoras formula C² = a² + b² , Which is similar to C = √a²+b². Here we used Math.sqrt() function to calculate the square root of the a²+b²

c = Math.sqrt((width * width) + (height * height));

In the next line, We are calculating the perimeter using the formula

Perimeter = width + height + c;

Following System.out.format statements will help us to print the Perimeter, Other side and Area of a right angled Triangle

System.out.format("\n The Area of a Right Angled Triangle = %.2f\n",Area);
System.out.format("\n The Other side of a Right Angled Triangle is: %.2f\n",c);
System.out.format("\n The Perimeter of a Right Angled Triangle = %.2f\n", Perimeter);

Java Program to find Area of a Right angled triangle using Functions

This Java program allow the user to enter width and height of the right angled triangle. In this example, we are going to use the logic that we specified in first example but we will separated the logic and place it in a method.

JAVA CODE

// Java Program to find Area of a Right angled Triangle
package Area;

import java.util.Scanner;

public class AreaOfRightTriangleUsingMethods {
	private static Scanner sc;

	public static void main(String[] args) {
		double width, height; 
		sc = new Scanner(System.in);
		
		System.out.println("\n Please Enter the Width of a Right Angled Triangle: ");
		width = sc.nextDouble();
		System.out.println("\n Please Enter the Height of a Right Angled Triangle: ");
		height = sc.nextDouble();
		
		AreaofRightTriangle(width, height);

	}
	public static void AreaofRightTriangle( double width, double height ) {
		double c, Area, Perimeter; 
		
		Area = 0.5 * width * height;
		c = Math.sqrt((width * width) + (height * height));
		Perimeter = width + height + c;

		System.out.format("\n The Area of a Right Angled Triangle = %.2f\n",Area);
		System.out.format("\n The Other side of a Right Angled Triangle is: %.2f\n",c);
		System.out.format("\n The Perimeter of a Right Angled Triangle = %.2f\n", Perimeter);
	}
}

OUTPUT

Java Program to find Area of a Right angled triangle using Oops

In this example, we are dividing the code using the Object Oriented Programming. To do this, First we will create a class which holds a methods.

JAVA CODE

package Area;

public class AreaOfaRightTriangle {
	double c, Area, Perimeter; 
	public void AreaofRightTriangle( double width, double height ) {
		Area = 0.5 * width * height;
		c = Math.sqrt((width * width) + (height * height));
		Perimeter = width + height + c;

		System.out.format("\n The Area of a Right Angled Triangle = %.2f\n",Area);
		System.out.format("\n The Other side of a Right Angled Triangle is: %.2f\n",c);
		System.out.format("\n The Perimeter of a Right Angled Triangle = %.2f\n", Perimeter);
	}
	
	public double RightTriangle( double width, double height ) {
		Area = 0.5 * width * height;
		return Area;
	}
}

Within the Main program, we will create an instance of the above specified class and call the methods.

JAVA CODE

package Area;

import java.util.Scanner;

public class AreaOfRightTriangleUsingClass {
	private static Scanner sc;

	public static void main(String[] args) {
		double Area, width, height; 
		sc = new Scanner(System.in);
		
		System.out.println("\n Please Enter the Width of a Right Angled Triangle: ");
		width = sc.nextDouble();
		System.out.println("\n Please Enter the Height of a Right Angled Triangle: ");
		height = sc.nextDouble();
		
		AreaOfaRightTriangle art = new AreaOfaRightTriangle();
		art.AreaofRightTriangle(width, height);
		Area = art.RightTriangle(width, height);
		
		System.out.format("\n Second Method: The Area of a Right Angled Triangle = %.2f\n", Area);
	}

}

OUTPUT

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