How big can you go with your photos?

Somehow that guy, Pythagoras of Samos, always seems to crop up in your life. I thought he'd left mine on the final day I walked out of high school a looooong time back, but - no - he's still around. And even interfering in my photography! Before I go any further, in case any of you suffer from high-school amnesia, let me remind you - Pythagoras' theorem is a² + b² = c²

OK - and?