How to get perfect angles in Blockbench?

Whenever I try to connect rotated planes in Blockbench, they end up clipping through one another. Is there any "right way" to make angles in Blockbench?? I've seen it done successfully before, but I don't understand how to avoid either little gaps between the planes or them overlapping slightly :(

I don't know if the MCreator forums are the right place for a post exclusively about Blockbench, but I don't know where else to go.

UPDATE: I feel like an idiot, I just discovered that vertex snap is a thing. Please ignore this post. I hope anyone with the same question who stumbles across this finds it helpful.