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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.
So, just multiply 6 cm 2 x 10 cm to find the volume of the triangular prism. 6 cm 2 x 10 cm = 60 cm 3. Don't forget to state your answer in cubic units since you're working with volume. 1  You have just followed the simple formula for finding the volume of a triangular prism: 1/2 x bh x l.