include include

using namespace std;

double Otr(double Ax, double Bx, double Ay, double By) {
return sqrt((Ax - Bx)(Ax - Bx) + (Ay - By)(Ay - By));
}

int main() {
double Ax, Ay, Bx, By, Cx, Cy, Dx, Dy;

cout << "Enter the coordinates of point A (Ax Ay): ";
cin >> Ax >> Ay;
cout << "Enter the coordinates of point B (Bx By): ";
cin >> Bx >> By;
cout << "Enter the coordinates of point C (Cx Cy): ";
cin >> Cx >> Cy;
cout << "Enter the coordinates of point D (Dx Dy): ";
cin >> Dx >> Dy;
double AB = Otr(Ax, Bx, Ay, By);
double AC = Otr(Ax, Cx, Ay, Cy);
double AD = Otr(Ax, Dx, Ay, Dy);
cout << "Length of segment AB: " << AB << endl;
cout << "Length of segment AC: " << AC << endl;
cout << "Length of segment AD: " << AD << endl;
return 0;

}