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 file:

public class Geometry { /** Computes the area of a triangle @param x1 the x-coordinate of the first corner @param y1 the y-coordinate of the first corner @param x2 the x-coordinate of the second corner @param y2 the y-coordinate of the second corner @param x3 the x-coordinate of the third corner @param y3 the y-coordinate of the third corner @return the area of the triangle */ public static double triangleArea(double x1, double y1, double x2, double y2, double x3, double y3) { ... } }