The third image is a hexagonal prism and has a hexagon for its cross section. The length of the prism has been marked with an arrow and labelled, length. The second image is a pentagonal prism and has a pentagon for its cross section. The first image is a triangular prism and has an equilateral triangle for its cross section. Previous image Next image Slide 1 of 8, A series of four images. A cylinder is not a prism because the circle is not a polygon. A 3D shape with a circular cross-section is a cylinder. A prism with a pentagon-shaped cross-section is a pentagonal prism. A prism with a triangle-shaped cross-section is a triangular prism. The polygon shape of the cross-section may be used to name the prism. That means that the cross-section is the same throughout the length of the prism. There is a red cross next to the cylinder. The triangular and pentagonal cross sections are coloured green. There is a green tick next to the triangular and pentagonal prisms. The fourth image is a cylinder and has a circle for its cross section. The third image is a pentagonal prism and has a pentagon for its cross section. The second image has an equilateral triangle for its cross section. The first image has a right angled triangle for its cross section. The first and second images are triangular prisms. Each image shows a three dimensional shape. Previous image Next image Slide 1 of 9, A series of four images.
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