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