1012.java

import java.io.IOException;
import java.util.Scanner;

public class Main {
 
    public static void main(String[] args) throws IOException {
 
        double A, B, C, area;
        
        Scanner sc = new Scanner(System.in);
        
        A = sc.nextDouble();
        B = sc.nextDouble();
        C = sc.nextDouble();
        
        area = A*C/2;
        System.out.printf("TRIANGULO: %.3f\n", area);
        
        area = 3.14159*C*C;
        System.out.printf("CIRCULO: %.3f\n", area);
        
        area = (A+B)*C/2;
        System.out.printf("TRAPEZIO: %.3f\n", area);
        
        area = B*B;
        System.out.printf("QUADRADO: %.3f\n", area);
        
        area = A*B;
        System.out.printf("RETANGULO: %.3f\n", area);
    }
 
}