For example, insert a square root symbol in Word by typing \sqrt in the document, followed by a space. Upon pressing the space bar, Word automatically turns \sqrt into a square root symbol.ip. If your default font does not include the square root symbol, switch to the Cambria Math font before inserting the root square symbol by selecting Cambria Math from the Font drop-down menu in the Ribbon's Home tab. AutoCorrect keywords are case-sensitive.