Decagon ABCDEFGHIJ is rotated centered at G by an angle of x, and moves point D to J. Find x if it is less than 180 degrees.
Each interior angle of the decagon is ((n-2) * 180)/n= 144 degrees. So if D is shifted over to J which is 6 or 4 angles over, x= 144 * 6 or 144 * 4= 864 or 576 degrees. Neither angle is less than 180 degrees, so I'm not sure if the problem is correct.