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You've made great progress.

In your constructors (all of them), you need to differentiate between the instance variable 'length' and the method parameter 'length'. That is done by using the...

1 & 2 - I see you have the code to get the user's menu selection that specifies the shape and then the program collects a length.

3 & 4 - The next step would be to use that info to create an...

What help do you need? If you have a question, ask it and be as specific as possible. If there are errors, post them, copied and pasted from just as they appear at your end. If the program is not...