TrapeziodArea

package firstStepsInCoding.MoreExercises;

import java.util.Scanner;

public class TrapeziodArea {
    public static void main(String[] args) {
        Scanner scanner= new Scanner(System.in);
        double b1 =Double.parseDouble(scanner.nextLine());
        double b2 =Double.parseDouble(scanner.nextLine());
        double h =Double.parseDouble(scanner.nextLine());
        double result=(b1+b2)*h/2;
        System.out.printf("%.2f",result);

    }
}