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  1. #include <iostream>
  2. #include <cmath>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	double a, b, c;
  7. 	cin >> a >> b >> c;
  8. 	double angle0 = acos((b * b + c * c - a * a) / (2 * b * c));
  9. 	double angle1 = acos((c * c + a * a - b * b) / (2 * a * c));
  10. 	double angle2 = acos((a * a + b * b - c * c) / (2 * a * b));
  11. 	double maxAngle = angle0 > angle1 ? (angle0 > angle2 ? angle0 : angle2) : (angle1 > angle2 ? angle1 : angle2);
  12. 	if(maxAngle > M_PI / 2) {
  13. 		cout << "Тупоугольный";
  14. 	} else if(maxAngle == M_PI / 2) {
  15. 		cout << "Прямоугольный";
  16. 	} else {
  17. 		cout << "Остроугольный";
  18. 	}
  19. 	cout << endl;
  20. 	return 0;
  21. }
Success #stdin #stdout 0s 3464KB
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Остроугольный
https://ideone.com/srb32T
Mif7
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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