Acute angles, Obtuse angles, Right angles, Complementary angles, Supplementary angles, Vertical Angles, Alternate interior angles, Alternate exterior angles, Corresponding angles. Hey, I found all of that at a mathematics site. I even know what some of that means. But this challenge is not about math or geometry unless you want it to be. What I've got in mind is the visual aspect of angles. Particularly as they relate to how we see things.
Angles are everywhere. We use or feature them in our photos without even thinking about it. And that's fine. Sometimes you can think too much about things and spoil the flow. But I'm hoping this challenge theme will stimulate us all to come up with some interesting ideas featuring angles as a prominent theme in our photographs.
I also thought this might be a nice compliment to the previous challenge theme of "Round". Not that circles are not related to angles, of course, but I think you get the idea :)
So letís see some angles, everyone. And most of all, have fun!