Nestor will rotate triangle abc 180° about one of the labeled points.
nestor says, “the image and pre-image will touch the pre-image at more than one point.”
which points could be his center of rotation?
select each correct answer.
point a
point b
point c
point d
point e
point f

Base on the question where as asking what point would be the center or the rotation if the triangle is rotated 180 degree and the pre image should touch the original image more that ones, base on that, the possible answers would be point D, E and F, if they are in the center of the triangle 

Is there a picture of a graph or whatever that goes along with this?