To type the square root symbol on a PC, hold the Alt key. Type "251", and release the Alt key.
- Hold the Alt key
Press the Alt key, and hold down on it. The two Alt keys are located on the keyboard on either side of the space bar.
- Type "251"
Type the numbers "251" using the number keypad. The numbers at the top of the main section of your keyboard below the function keys do not work for this.
- Release the Alt key
Stop pressing down on the Alt key. The square root symbol should appear next to the cursor.