Question

Write the perimeter of the floor plan shown as an algebraic expression in x

Answer 1

From the figure, the perimeter is

P = 11 + (x-2) + (11-3) + [(x-2) - (x-11)] + (x-11)

= 11 + x - 2 + 8 + 9 + x - 11

= 2x + 15