1.#include<iostream>using namespace std; int main() { int a, b, c; cin >> a; cin >> b; cin >> c; if ((a > b + c) || (b > a + c) || (c > a + b)) cout << "Eto ne treugol'nik" << endl; else { if ((c*c == (a*a + b*b)) || (b*b == (c*c + b*b)) || (a*a == (c*c + b*b))) cout << "Pryamougol'niy" << endl; else if ((a == b) && (a == c)) cout << "Ravnostoronniy" << endl; else if ((a == c) || (a == b) || (b == c)) cout << "Ravnobedrenniy" << endl; else cout << "Treugol'nik" << endl; } system("pause"); }2.#include<iostream>using namespace std; int main() { float a, b, c; cin >> a; cin >> b; cin >> c; if (a*b == c) cout << "c/a=" << c/a; system("pause"); }