public class Triangle {

   public static void main(String[] args) {
      double x1 = 2, y1 = 1, x2 = 6, y2 = 1, x3 = 6, y3 = 4;
      double a, b, c;
      
      a = 
      
      // b and c are similar
      
      double s = 
      
      double area = 
      
      System.out.println("Area: " + area);
   }
}

int sum = 0;
for (int i = 1; i <= 10; i++) {
   sum = sum + i;
}
System.out.println("Sum: " + sum); // sum was i in error on actual exam

double sum = 0;
double term = 1.0;
for(int i = 1; i <= 4; i++) {
   sum = sum + term;
   // calculate term for next loop
   term = 0.5*term;
}
System.out.println(sum);

public class Triangle {

   public static void chars(char ch, int n) {
      for (int i = 1; i <= n; i++)
         System.out.print(ch);
   }
   
   public static void main(String[] args) {
      for (int i = 0; i <= 4; i++) {
         chars(' ', i); chars('*', 5-i);
         System.out.println();
      }
   }
}

int[] a = {22, 33, 55, 88};

public class Array {

   public static void printArray(int[] x) {
      for (int i = 0; i < x.length; i++)  // loop to print numbers
         System.out.print(x[i] + " ");
      System.out.println();
   }
      
   public static void main(String[] args) {
      int[] a = {12, 23, 34, 45, 56};
      int[] b = {4, 1, 2, 5, 3};
      printArray(a);     
   }
}