Asquare rotated about it's center by 360 degrees maps onto itself at what different angles of rotation. you can reflect a square onto itself across how many different lines of rotation

since a square has equal length sides

 it can be rotated 90, 180, 270 and 360 degrees

828. all there is to it!

here, if you ever need with rounding (or other forms of arithmetic/math) again, use this:

thats the rounding one, but if you just click the top left, it shows you all the calculators you may need!

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square