#include <stdio.h> #include <math.h> int main() { //Heron's Formula float a,b,c,C,P,S; scanf("%f %f %f",&a,&b,&c); C=a+b+c; P=C/2.0; S=sqrt(P*(P-a)*(P-b)*(P-c)); printf("circumference=%.2f area=%.2f",C,S); return 0; }
