I've got one question left on my assignment, and I'm not too sure what the questions even asking.

Here's the question:

Can somebody help me understand this question? And is the question asking about 2D or 3D models? I can understand how 2D might be possible to work out, but have no idea about 3D, since the height (z-axis) is not specified.

Maybe I'm just looking at the question the wrong way! Any help is accepted .