#include <stdio.h>
#include <math.h>
int main() {
const double pi = 3.14159; //Contant value of pi
double A, B, C;
scanf("%lf%lf%lf", &A
, &B
, &C
);
double Area_Triangle = 0.5*A*C;
// area of triangle
double Area_Circle
= pi
*pow(C
,2);
double Area_Trapezium = 0.5*(A+B)*C;
double Area_Square
= pow(B
,2);
double Area_Rectangle = A*B;
printf("TRIANGULO: %.3lf\n", Area_Triangle
); printf("CIRCULO: %.3lf\n", Area_Circle
); printf("TRAPEZIO: %.3lf\n", Area_Trapezium
); printf("QUADRADO: %.3lf\n", Area_Square
); printf("RETANGULO: %.3lf\n", Area_Rectangle
);
return 0;
}
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