A mirror line is marked as the dotted line at x = 3. The triangle can be reflected in this mirror line so that point A ends up at a new point D and point B ends up at a new point E.
(c) Draw the reflected image of the triangle across this mirror line and label the two new points D and E.
Louis hires a builder to lay the path. The builder charges £8 per hour basic labour
for the job, and then £1.50 per slab he lays.
(d) If he takes 3½ hours to finish the job, work out his overall fee.