Ah, yes! A more concrete prompt than last week's Photo Challenge of "happiness." Keith does a great job of taking a very straightforward term and interpreting it in his own way, or just composing a really unique image. After the indecision over what image constituted "happiness," Keith immediately had a plan for "triangle."
During lunch last week, he walked from work to the Rock and Roll Hall of Fame and took some pictures. Over the weekend he touched up his favorites, and he was all done by Monday!
I think it's good to have a really concrete week directly following a hard, abstract concept. I don't know if that is planned intentionally, but it makes sense to me! I'm not sure what kinds of photo prompts are left .... I hope, for Keith's sake, it doesn't end up with a solid month of "life" and "misery" and the like.