#define _CRT_SECURE_NO_WARNINGS 1#include<stdio.h>#include<math.h>int main(){ int a, b, c; scanf("%d%d%d", &a, &b, &c); float circumference = 0; float area = 0; circumference = a + b + c; area = 0.25 * sqrt((a + b + c) * (a + b - c) * (a - b + c)*(b + c - a)); print...