Question

Which expressions represent the area of the entire shaded region, including the light and dark shading? Select three options.

12a cm2
2b cm2
(6a – b) cm2
(12a + 2b) cm2
(6a + b) cm2

Answer 1

12a, (6a − b), and (6a + b)

Reason: the two parts are 6a − b and 6a + b; their sum is (6a − b) + (6a + b) = 12a, so each of those three expressions represents the total shaded area.