compter graphics

Project Description: I need help with my computer graphics class project. I'm using graphics 2D and MouseListener interfaces and some more. I have done the first part ( a description of the assignment is attached also attached is my code for it.). but I need help with the 2nd part. here it is : Designate (with the mouse) and draw triangles. Only one triangle should be present at a time. When the user creates a triangle, the old one (if present) should disappear. Normalize the triangle to counter-clockwise vertices. If the user inputs you triangle as clockwise vertices your program should reorder them. Determine if the cursor is inside the triangle on a mouse press. This will require another mode. That is, you will have one mode that draws the triangle and one mode that allows the user to click inside/outside the triangle. Provide a GUI object (perhaps a JTextField element) to tell the user whether or not the cursor was inside the triangle when the mouse button was pressed. Compute and draw the circumscribed circle for the triangle. Provide a GUI button to cause the computation/drawing event. Compute and draw the inscribed circle for the triangle. Provide a GUI button to cause the computation/drawing event.