Answer 38.4 sq inches is the total shaded area
Area formula = 1/2 × b × h
Triangle 1 = 1/2 (5.4 ) ( 6.4) = 17.28 sq in.
Triangle 2 = 1/2 ( 6.6) (6.4 ) = 21.12 sq in.
Add them together
17.28 + 21.12 = 38.4 sq in.
38.4 sq inches is the total shaded area