Points inside the house

import java.util.Scanner;

public class PointsInsideTheHouse {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);

        // Point coordinates
        System.out.println("Enter point coordinates:");
        float pX = input.nextFloat();
        float pY = input.nextFloat();

        // triangle vertices
        float leftTipX = 12.5f;
        float leftTipY = 8.5f;
        float rightTipX = 22.5f;
        float rightTipY = leftTipY;
        float topX = 17.5f;
        float topY = 3.5f;

        // big rectangle borders
        float bigRectXmin = 12.5f;
        float bigRectXmax = 17.5f;
        float bigRectYmin = 8.5f;
        float bigRectYmax = 13.5f;

        // small rectangle borders;
        float smallRectXmin = 20f;
        float smallRectXmax = 22.5f;
        float smallRectYmin = bigRectYmin;
        float smallRectYmax = bigRectYmax;
        String result = "Outside";
        /*
         * The point must be on the inner side of all triangle lines, or to lie
         * on some of them to belong to the triangle
         */
        float pointPosition1 = calcPointPositionToLine(leftTipX, leftTipY,
                rightTipX, rightTipY, pX, pY);
        float pointPosition2 = calcPointPositionToLine(leftTipX, leftTipY,
                topX, topY, pX, pY);
        float pointPosition3 = calcPointPositionToLine(rightTipX, rightTipY,
                topX, topY, pX, pY);

        if (pointPosition1 <= 0 && pointPosition2 >= 0 && pointPosition3 <=0 ) {
            result = "Inside";
        } else if (pX >= bigRectXmin && pX <= bigRectXmax && pY >= bigRectYmin
                && pY <= bigRectYmax) {
            result = "Inside";

        } else if (pX >= smallRectXmin && pX <= smallRectXmax
                && pY >= smallRectYmin && pY <= smallRectYmax) {
            result = "Inside";
        }
        System.out.println(result);

    }

    /**
     *
     * @param aX, aY, bX, bY - coordinates of the ending points of the line AB
     * @param cX, cY - coordinates of the point we are checking for
     * @return - if value is positive the point is on the right side of the line
     * if value is negative the point is on the left side of the line
     * and if the result is 0 the point lies on the line.
     */
    public static float calcPointPositionToLine(float aX, float aY, float bX,
            float bY, float cX, float cY) {
        float result = (aX * (bY - cY) + bX * (cY - aY) + cX * (aY - bY)) / 2;
        return result;
    }

}