The fourth question on page 62 of the fifth-grade mathematics basic training of Beijing Normal University Edition is trapezoid, the upper part is 6.2 meters, the lower part is 3.8 meters and the height is 4.5 meters. Find the area of this trapezoid. We know that the area of a trapezoid is equal to the sum of the upper bottom and the lower bottom, multiplied by the height and divided by two, so the area of this trapezoid is (6.2+3.8)? 4.5÷2