I'm currently interested in movement and simple reach rules for my thorn whip cantrip that has 30 feet range.
Now My PC (green p) could obviously move to and reach with cantrip A and B
I've seen DMs who would allow reaching W, but I find it wrong
So the question is only about reaching C and D. i.e.
are creatures C and D within 30 feet of creature p ? in this picture.
By the way, some math here - creature D is SQRT(25*25+15*15)=29.15 feet from p if me measure the direct line between two creatures. So both mathematically and based on DMG 252 D is within 30 feet. I just want to double check if DM is