Quinn is determining the area of a trapezoid. His work is shown below. mc012-1.jpg Step 1: Break the figure into rectangles and

triangles. mc012-2.jpg Step 2: Find the area of the rectangle: mc012-3.jpg. Step 3: Find the area of the triangles: mc012-4.jpg. Step 4: Add the areas together: mc012-5.jpg square centimeters. Which best describes Quinn’s error?