#include <stdio.h> #include <math.h> int main() { int a,b,c; double p,cir,area; scanf("%d %d %d",&a,&b,&c); cir=a+b+c; p=cir/2; area=sqrt(p*(p-a)*(p-b)*(p-c)); printf("circumference=%.2lf area=%.2lf",cir,area); return 0; }