A trapezoid inside another trapezoid. The interior trapezoid is not shaded, but the outer one is. The interior trapezoid has base lengths of 2 and 4 units and a height of 3 units. The exterior trapezoid has base lengths of 2 and 6 units and a height of 6 units. Part A Which of the following explains how to find the area of the shaded region shown? Find the area of the inner and outer trapezoids, and add them together. Find the area of the outer trapezoid and then subtract the area of the inner trapezoid. Count the shaded grid squares and estimate the number of partially shaded squares. Find the area of the outer trapezoid.