[IAmBroom]

It's called a "gradian", and it's 1% of a right angle.

It's still used in some industries, where convenient.

[hilbert42]

Yeah, sure. The last person I heard discuss it was my highschool math teacher and he did so only in passing—and that was quite some decades ago.

Anyway, my non-metric preference is the radian unless I'm doing something manual like woodworking.