5 in 5 in 4.3 in 14 in 5 in -What is the shape of the above figure? Triangular prism, Rectangular prism, or Cylindrical? -Which Surface Area formula should I use from the chart at the top of this page for Total surface area? - Find the perimeter and/or area of the shape you chose in the first question. (For example, if you chose triangular prism, then find the area and perimeter of the triangular part).​