45 cm 15 cm 25 cm -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 the Lateral 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).​