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Right Angle ALT Codes

ALT+28

To type right angle ∟ on your computer, Just hold down the Alt key while typing the alt key code 28 on the numeric keypad of your keyboard. If you don not have one, hold down the Fn and Alt keys while typing the alt code number.
Symbols » Alt Codes » Alt Codes ( ᗩᒪ☂ ℃ṎᗪḘṦ )