This figure consists of a small triangle and a flat quadrilateral. The base of the triangle is 3.5, the height is 1.8, and the area is 3.5* 1.8/2=3. 15 square decimeter. Parallelogram knows that a height is 3.2 and a base is 3.5, but it is not known the height on the base, so it cannot be used. There is no condition for calculating the area of the flattened quadrilateral in the known conditions, so it is impossible to calculate the area of the flattened quadrilateral and the area of this combined figure.