What is the GCF of the terms of the polynomial -12^4+8y^3-4y^2
GCF= y=

If this figure is symmetric (as it seems to be) then is invariant to rotations of  90° in the plane where the center of each segment coincides with an axis, and when the axis of rotation is on the center of the figure.

So the rotation of 0°, the rotation of 90° and the rotation of 180° are possible solutions.

Here 180° because if you rotate the figure by 90° two times, you get 180°.