Uri problem 1012 solve

Problem :

Area

Adapted by Neilor Tonin, URI  Brazil

Timelimit: 1

Make a program that reads three floating-point values: A, B and C. Then calculate and print:
a) the area of the rectangled triangle that has base A and height C.
b) the area of the circle of radius C. (pi = 3.14159)
c) the area of the trapezium which has base A and B and C by height.
d) the area of ​​the square that has side B.
e) the area of the rectangle that has sides A and B.

Input

The input file contains three double numbers with one digit after the decimal point.

Output

The output file contains 5 lines of data. Each line correspond to one of the areas described above, always with a corresponding message (in portuguese) and one space after the ":" and before the calculated number. All calculated number must be printed with 3 digits after the decimal point.

Sample Inputs	Sample Outputs
3.0 4.0 5.2	TRIANGULO: 7.800 CIRCULO: 84.949 TRAPEZIO: 18.200 QUADRADO: 16.000 RETANGULO: 12.000

12.7 10.4 15.2

TRIANGULO: 96.520 CIRCULO: 725.833 TRAPEZIO: 175.560 QUADRADO: 108.160 RETANGULO: 132.080

Solution:

#include <stdio.h>

  

int main() {




   double a,b,c;

 

    double pi=3.14159;

 

    scanf("%lf %lf %lf",&a,&b,&c);

     

    printf("TRIANGULO: %.3lf\n", (a*c)/2);

    printf("CIRCULO: %.3f\n", pi*c*c);

    printf("TRAPEZIO: %.3lf\n", ((a+b)*c)/2);

    printf("QUADRADO: %.3lf\n", b*b);

    printf("RETANGULO: %.3lf\n", a*b);

 

 

  

    return 0;

}