6. in the diagram shown, angle abc is drawn along with point d.
(a) plot angle a'b'c', the image of angle abc after a clockwise rotation
of 90° about point d. give the coordinates of the new
vertices below.

(b) denise proposes the following transformation rule for this
rotation:
(x, y) (y +4, - x-2)
does this rule work? justify your answer.

(c) angle a'b'c' has the same size and shape as angle abc. why is this true?