- #include <iostream>
- #include <iomanip>
- using namespace std;
- int main()
- {
- int side1, side2, heigh;
- double area;
- cin >> side1 >> side2 >> heigh;
- area = ((side1+side2)*heigh)/2.0;
- cout << "Trapezoid area:" << fixed << setprecision(1) << area << endl;
- return 0;
- }