hi can anyone help me out on my java assignment plz. basically i have all thse geometric shapes such as , square, rectangle, circle,triangles and u know the usual. i need to put thses shapes in classes and make a effiecient design, eg. square and rectangle are similar to each other so i would put them in a class maybe called four seides shape. i have to make a class hierachie wtih all thses different shapes. can someone plz help mje to achieve this.]