#include <bits/stdc++.h> #include <cmath> #include <math.h> using namespace std; struct point { double x, y; point(double A, double B) { x = A, y = B; } point() = default; }; struct triangle { point a, b, c; triangle(point A, point B, point C) { a = A, b = B, c = C; } triangle() = ...