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What shapes are the faces on a triangular prism? A triangular prism consists of 3 rectangles and 2 triangles (one on each end). For comparison: a rectangular pyramid (like the Great Pyramids) have 4 triangles and 1 rectanglâ¦e (usually a square). A triangular pyramid has 4 triangles (imagine a normal pyramid, but with only three sides and the bottom is a triangle as well). 6 people found this useful.
Surface Area of a Rectangular Prism using Nets. A rectangular prism or cuboid is formed by folding a net as shown: We can see from the net that there are two rectangles with dimensions 3 cm by 6 cm, two rectangles with dimensions 2 cm by 6 cm and two rectangles with dimensions 2 cm by 3 cm. The total surface area is then.