I’ve used tons of geometry in games. I've heard it's useful IRL but I never go to there.
If you've ever played Minecraft, basic math is a must unless you want to be wasteful and/or discover you don't have enough of something constantly.
Especially Minecraft! I use the line formula to not waste eyes of ender.
I think I tried that once and couldn't get it to work. I'm pretty sure my math was fine, I think it just either that it wasn't measured accurately enough or I was unlucky and the second eye ended up pointing at a different stronghold. Very cool that you got it working!
You could always just use the rules for diagonals on page 252 of the DMG
Range 36? I'd give it to them, unfortunately, Google tells me bless is range 30.
As a long-time DM, this sort of loosey-goosey handling of basic math in D&D is how Flight makes it into 1st level games... ie. "What could go wrong?" is the epitaph for the vast majority of games killed by shenanigans. 😜
I'll see your Pythagorean Theorem range question and raise you a Feramt's Last Theorem based magic puzzle/lock/trap (laughs in maths)
I used to make CS:S maps in middle school and when I had to make a rail for stairs I felt like a genius whipping out Pathagora. I really havent had to use it after that butttttt I did use it in my real life at one point.