How Do You Fix a Square

Use a center punch

How do you get something square?

Just measure across the diagonals from corner to corner. If the measurements are equal then the corners are square.

How do you reverse a square?

To undo squaring, we take the square root. In general terms, if a is a positive real number, then the square root of a is a number that, when multiplied by itself, gives a. The square root could be positive or negative because multiplying two negative numbers gives a positive number.