Â· just now. Report Abuse. Click Insert then go to Symbols tap and a dialog box will appear. You have two choises to do: 1- Select  Latin-1 supplement in Subset field 2- Type 00B2 in Character Code Locate the Square root symbol there and select it then click Insert.Osama Â· 1 year ago.lick Insert then go to Symbols tap and a dialog box will appear. You have two choises to do: 1- Select  Latin-1 supplement in Subset field 2- Type 00B2 in Character Code Locate the Square root symbol there and select it then click Insert. Osama Â· 1 year ago.