Answer:
Option D. 360°
Explanation:
As we can see in the figure attached Its a regular hexagon having center at origin.
We know for a regular hexagon inscribed area can be divided in six equal triangles. Since every triangle is equilateral triangle so all angles at the center should be 60°.
If we rotate (-2, 4) by 60° the point (-2, 4) replaces (2, 4). Now to get this point (-2, 4) back to its original position hexagon should be rotated by six times of 60° (6×60°= 360°).
Therefore, to get identical image of original hexagon it should be rotated by angle k = 360°
Option D 360° is the answer.