Write a Program to Calculate the Area Different Geometrical Shapes

area = (float)3.14159*radius*radius;

area = (float)length*breadth;

s = (float)(a+b+c)/2;
area = (float)(sqrt(s*(s-a)*(s-b)*(s-c)));

area = (float)side*side;

area = (float)base*height;

#include <stdio.h>
#include <math.h>

int main()
{
	float area, radius, width, length, breadth, base, height, side;
	float a,b,c,s;
	int choice;
	
	printf("**********Choose an Option:*********\n ");
	printf("1: Area of the Circle\n ");
	printf("2: Area of the Rectangle\n ");
	printf("3: Area of the Triangle\n ");
	printf("4: Area of the Square\n ");
	printf("5: Area of the Parallelogram\n ");
	
	//choose the desired shape
	scanf("%d", &choice);
	
	//area of a circle
	switch(choice)
	{
	case 1:
	{
		printf("Enter the radius of the Circle: ");
		scanf("%f", &radius);
		area = 3.1459*radius*radius;
		printf("The area of the circle is %.2f", area);
		break;
	}
	
	//area of a rectangle
	
	case 2:
	{
		printf("Enter the Width of the rectangle: ");
		scanf("%f", &width);
		printf("Enter the length of the rectangle: ");
		scanf("%f", &length);
		
		area = width*length;
		printf("The area of the rectangle is %.2f", area);
		break;
	}
	//area of a triangle using Heron's formula
	case 3: 
	{
		printf("Enter the 3 sides of a triangle. Eg, (12 13 14):  ");
		scanf("%f %f %f", &a, &b, &c);
		s = (a+b+c)/2;
		area = sqrt(s*(s-a)*(s-b)*(s-c));
		printf("The area of the triangle is %.2f", area);
		break;
	}
    //area of a square
	case 4: 
	{
		printf("Enter the side of the Square: ");
		scanf("%f", &side);
		area = side*side;
		printf("The area of the square is %.2f", area);
		break;
	}
    //area of a parallelogram
    case 5: 
	{
		printf("Enter the base and height of the Parallelogram: ");
		scanf("%f %f", &base, &height);
		area = base*height;
		printf("The area of the parallelogram is %.2f", area);
		break;
	}
    default:
    {
        printf("Wrong Choice");
        break;
    }
	}
    return 0;
}
 

**********Choose an Option:*********
 1: Area of the Circle
 2: Area of the Rectangle
 3: Area of the Triangle
 4: Area of the Square
 5: Area of the Parallelogram
 5
Enter the base and height of the Parallelogram: 3 4
The area of the parallelogram is 12.00

#include <iostream>
#include <cmath>
using namespace std;

int main()
{
	float area, radius, width, length, breadth, base, side, height;
	float a,b,c,s;
	int choice;
	
	cout<<"**********Choose an Option:*********\n ";
	cout<<"1: Area of the Circle\n ";
	cout<<"2: Area of the Rectangle\n ";
	cout<<"3: Area of the Triangle\n "; 
	cout<<"4: Area of the Square\n "; 
	cout<<"5: Area of the Parallelogram\n "; 
       
        //input the desired shape 
        cin>>choice;
	
	//area of a circle
	switch(choice)
	{
	case 1:
	{
		cout<<"Enter the radius of the Circle: ";
		cin>>radius;
		area = 3.1459*radius*radius;
		cout<<"The area of the circle is "<< area;
		break;
	}
	
	//area of a rectangle
	
	case 2:
	{
		cout<<"Enter the Width of the rectangle:";
		cin>>width;
		cout<<"Enter the length of the rectangle: ";
		cin>>length;
		
		area = width*length;
		cout<<"The area of the rectangle is "<< area;
		break;
	}
	//area of a triangle using Heron's formula
	case 3: 
	{
		cout<<"Enter the 3 sides of a triangle. Eg, (12 13 14):  ";
		cin>>a>>b>>c;
		s = (a+b+c)/2;
		area = sqrt(s*(s-a)*(s-b)*(s-c));
		cout<<"The area of the triangle is "<<area;
		break;
	}
    //area of a square
	case 4: 
	{
		cout<<"Enter the side of the Square: ";
		cin>>side;
		area = side*side;
		cout<<"The area of the square is "<<area;
		break;
	}
    //area of a parallelogram
    case 5: 
	{
		cout<<"Enter the base and height of the Parallelogram: ";
		cin>>base>>height;
		area = base*height;
		cout<<"The area of the parallelogram is "<<area;
		break;
	}
    default:
    {
        cout<<"Wrong Choice";
        break;
    }
	}
    return 0;
}

**********Choose an Option:*********
 1: Area of the Circle
 2: Area of the Rectangle
 3: Area of the Triangle
 4: Area of the Square
 5: Area of the Parallelogram
 3
Enter the 3 sides of a triangle. Eg, (12 13 14):  7 8 6
The area of the triangle is 20.3332

import math

print("**********Choose an Option:********* ");
print("1: Area of the Circle");
print("2: Area of the Rectangle ");
print("4: Area of the Triangle ");
print("5: Area of the Square ");
print("6: Area of the Parallelogram ");

# input the desired shape
choice = int(input(""))

# area of a circle
if choice==1:
    # input circle radius
    radius = float(input("Enter the radius of the Circle: "))
    area = math.pi*pow(radius,2)
    print(f"The area of the circle with radius {radius} is : {round(area,2)}")

#area of a rectangle
elif choice==2:
    width =float(input("Enter the width of the rectangle: "))
    length = float(input("Enter the length of the rectangle: "))
    area = width*length
    print(f"The area of the rectangle is {round(area,2)}")

# area of a triangle using Heron's formula
elif choice ==3:
    a, b , c = map(float, input("Enter the 3 sides of triangle eg (12 13 14):").split())
    s= (a+b+c)/2
    area = math.sqrt(s*(s-a)*(s-b)*(s-c))
    print(f"The area of the triangle is {round(area,2)}")

#area of a Square
elif choice ==4:
    side =float(input("Enter the side of the square: "))
    area = side*side
    print(f"The area of the square is {round(area,2)}")

#area of a Parallelogram
elif choice ==5:
    base =float(input("Enter the base of the parallelogram: "))
    height = float(input("Enter the height of the parallelogram: "))
    area = base*height
    print(f"The area of the parallelogram is {round(area,2)}")

else: 
    print("Wrong Choice")

**********Choose an Option:********* 
1: Area of the Circle
2: Area of the Rectangle 
3: Area of the Triangle 
4: Area of the Square 
5: Area of the Parallelogram 
2
Enter the width of the rectangle: 5
Enter the length of the rectangle: 8
The area of the rectangle is 40.0

import java.util.Scanner;
import java.lang.Math;

public class ShapeAreaCalculator {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("Which shape do you want to calculate the area for?");
        System.out.println("1. Circle");
        System.out.println("2. Rectangle");
        System.out.println("3. Triangle");
        System.out.println("4. Square");
        System.out.println("5. Parallelogram");
        int choice = input.nextInt();

        switch (choice) {

            //area of a circle
            case 1:
                System.out.println("Enter the radius of the circle:");
                double radius = input.nextDouble();
                double circleArea = Math.PI * Math.pow(radius, 2);
                System.out.println("The area of the circle is: " + circleArea);
                break;

            //area of a rectangle
            case 2:
                System.out.println("Enter the length of the rectangle:");
                double length = input.nextDouble();
                System.out.println("Enter the width of the rectangle:");
                double width = input.nextDouble();
                double rectangleArea = length * width;
                System.out.println("The area of the rectangle is: " + rectangleArea);
                break;
            
            //area of a triangle using Heron's Formula
            case 3:
                System.out.println("Enter the sides of the triangle Eg. (13 14 15):");
                double a = input.nextDouble();
                double b = input.nextDouble();
                double c = input.nextDouble();
                double s;
                s = (a+b+c)/2;
                double p = Math.sqrt(s * (s-a) * (s-b) * (s-c));
                double triangleArea = p;
                System.out.println("The area of the triangle is: " + triangleArea);
                break;

            //area of a square
            case 4: 
                System.out.println("Enter the side of the square:");
                double side = input.nextDouble();
                double squareArea = side*side;
                System.out.println("The area of the square is: " + squareArea);
                break;

            //area of a parallelogram
            case 5: 
                System.out.println("Enter the base of the parallelogram:");
                double base1 = input.nextDouble();
                System.out.println("Enter the height of the parallelogram:");
                double height1 = input.nextDouble();
                double parallelogramArea = 0.5 * base1 * height1;
                System.out.println("The area of the triangle is: " + parallelogramArea);
                break;

            default:
                System.out.println("Invalid choice.");
        }
    }
}

Which shape do you want to calculate the area for?
1. Circle
2. Rectangle
3. Triangle
4. Square
5. Parallelogram
3
Enter the sides of the triangle Eg. (13 14 15):
12 13 14
The area of the triangle is: 72.30793524918272