Answer
a) On careful analysis of the image attached, we can see that the second figure is simply some sort of rotated version of the original image.
b) If AB = 2 cm, A'B' = 2cm too.
This is because we can see that the original image and the copy are exactly similar (only the rotation makes the difference).
c) We can see that the point D is on the length of the longer side of the figure ABC, so the point D' will also be on the longer side of the figure A'B'C'.
Hope this Helps!!!!