The shaded region is a triangle. Triangle area can be determined with formula a = 1/2 × b × h
From the question, we know that the triangle consists of base = 10 - 6 = 4 m and the height is the dimension which is perpendicular to the base, height = 6 m
Find the triangle area a = 1/2 × b × h a = 1/2 × 4 × 6 a = 1/2 × 24 a = 12
