Degree symbol
U+00B0 · °- LinuxCtrl + Shift + U, 00B0, Enter
In a compatible GNOME/GTK text field, press Ctrl + Shift + U, release the keys, type 00B0, then press Enter.
Applies to GNOME/GTK Unicode entry, not every Linux application. Use copy and paste when the app intercepts this shortcut. Source ↗