#include <iostream>
#include <iomanip>
#include <cmath>

using namespace std;

int main() {

	int input;

	cout << "1.	Calculate the Area of a Circle" << endl;
	cout << "2.	Calculate the Area of a Rectangle" << endl;
	cout << "3.	Calculate the Area of a Triangle" << endl;
	cout << "4.	Calculate the Area of a Trapezoid" << endl;
	cout << "5.	Calculate the Area of a Sphere" << endl;
	cout << "6.	Exit" << endl;
	cout << "Enter your Choice (1-6): " << endl;
	cin >> input;

	switch (input){

	case 1:
		const int pi = 3.14159;
		int circleRadius;
		int circleArea = pi * pow(circleRadius,2);

		cout << "Enter the radius of your Circle?" << endl;
		cin >> circleRadius;

		cout << "The Area of your Circle is: " << circleArea << endl;

		break;