Kayla’s work to find the surface area of a composite solid formed when a rectangular prism and rectangular pyramid are joined at their bases is shown below. A rectangular prism with a length of 6, width of 5 and height of 7. A rectangular pyramid with a base of 5 by 6. 2 triangular sides have a base of 6 and height of 9.2. 2 triangular sides have a base of 5 and height of 9.3.