Question

write a C++ program to find area of a circle and triangle
​

Answer 1

Solution:

The given cod‎es are written in CPP.

1. Area of a circle.

#include <iostream>

using namespace std;

int main() {

   float rad, area;

   cout << "Enter radius of the circle: ";

   cin >> rad;

   area = 3.14 * rad * rad;

   cout << "Area of the triangle is " << area << " square unit.";

   return 0;

}

▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬

2. Area of a triangle.

#include <iostream>

using namespace std;

int main() {

   float height, base, area;

   cout << "Enter height: ";

   cin >> height;

   cout << "Enter base: ";

   cin >> base;

   area = 0.5 * height * base;

   cout << "Area of the triangle is " << area << " square unit.";

   return 0;

}

Logic:

To calculate area of circle :-

(1) Accept the value of radius from user.

(2) Using formula Area = πr², calculate the area and store the result in a variable. Take π = 3.14

(3) Display the area of the circle.

To calculate area of triangle :-

(1) Accept the values of height and base from user.

(2) Using formula Area = bh/2, calculate the area and store the result in a variable.

(3) Display the area of the triangle.

Refer to the attachment for output.