What are diangonals when it's saying 'list the diagonals'?
what are diagonals?
Look up "diagonal" in your dictionary or the one on the internet. That will give you a better idea of what you are looking for.
Diagonals refer to the line segments that connect two non-adjacent corners or vertices of a polygon. In other words, they are the line segments that run from one corner of a shape to another, cutting across the interior of the shape.
For example, in a square, there are two diagonals - one that connects the top-left corner to the bottom-right corner, and another that connects the top-right corner to the bottom-left corner.
When a question asks you to list the diagonals, it means you need to identify and write down all the line segments that connect non-adjacent corners of the given shape.