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#include <iostream> #include <fstream> using namespace std; int main() { setlocale(LC_ALL, "Russian"); ifstream in("input.txt"); pair <float, float > a; pair <float, float> b; pair<float, float> c; pair<float, float> d; float A, B, P, S,Cx,Cy; in >> a.first >> a.second >> b.first >> b.second >> c.first >> c.second >> d.first >> d.second; A = a.first - b.first + 2; B = a.second - b.second + 2; P = 2 * (A + B); S = A * B; Cx = (a.first + b.first) / 2; Cy = (a.second + d.second) / 2; cout << "ПЕРИМЕТР - " << P << ' ' << "ПЛОЩАДЬ - " << S << ' ' << "Центр тяжести x и y - " << Cx << ' ' << Cy; }