Windows: hold `Alt` and type `0176` on the numeric keypad
Windows: press `Alt` + `248` on the numeric keypad
Windows: use `Character Map` and select `°`
Microsoft Word: type `00B0` then press `Alt` + `X`
Mac: press `Option` + `Shift` + `8`
Linux: press `Ctrl` + `Shift` + `U`, type `00B0`, then press `Enter`