#### Question 3

Pentagon $$ABCDE$$ can be moved on top of pentagon $$A'B'C'D'E'$$ by a reflection in the line labelled f.
The coordinates of A are (1, 7).

 a The perpendicular distance from A to line f is . b The perpendicular distance from A′ to line f is . c The x-coordinate of A′ is .

Pentagon $$ABCDE$$ is congruent to pentagon $$A'B'C'D'E'$$.