This activity aligns with Texas TEKS 6.8C.
Students cut out the figures and decompose them to fit into a rectangle. The trapezoid explains the (b1 +b2)/2 is used to find the 'average' of the base length.
Write equations that represent problems related to the area of rectangles, parallelograms, trapezoids, and triangles and volume of right rectangular prisms where dimensions are positive rational numbers.[6.8C]