 I don't know this problem. It's one of my favorites. It involves a 3 by 3 gear board which is one of my favorite resources. The first two parallel lines vertex to only the midpoint of the opposite or one of the opposite sides. So I now continue that process of drawing these lines and you can see a shape in the middle. So what questions can you ask? It looks like a square. Is it a square? What proportion of the area of the grid is this central square? It looks a bit like a quarter, but is it? So two questions to start you off. You may be able to think of further questions. Plus how many different ways can you do this problem? I've come across, I won't say hundreds, that would be a major exaggeration, but I've come across several approaches that will work. So I offer that to you, for you to work on. Thank you.