Given the corner points of a triangle (x1, y1), (x2, y2), (x3, y3), compute the area. Hint: The...

       Given the corner points of a triangle (x1, y1), (x2, y2), (x3, y3), compute the area.

Hint: The area of the triangle with corner points (0, 0), (x₁, y₁), and (x₂, y₂) is |x₁ · y₂ - x₂ · y₁| / 2.

Complete the following code:

public class Geometry
{
   /**
      A method to return the smaller of two integers
      @param a, the first integer
      @param b, the second integer
      @return small, the smaller of the two
   */
   public static double triangleArea(double x1, double y1,
      double x2, double y2, double x3, double y3)
   {
      ...
   }
}