The interesting part of this challenge is that many diagonal lines are also leading lines. Since we’ve already ‘done’ leading lines, I’ve tried to come up with some images that are all about the diagonal itself, rather than them being, even incidentally, leading lines too.
I think this is my favourite of this week’s selection:
And here are a couple of others:
And here are a couple of what Cee described as ‘implied diagonals’:
Finally, my favourite images from earlier contributions to this thread. The first from the Vertical Lines challenge and the one on the right from Leading Lines (which, neatly enough, is also an implied diagonal):