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It must have at least one.
5
A triangular prism has five faces.
A triangular prism has 9 edges!
A triangular prism has six vertices (corners).
there are two plane symmetry on triangular prism.
This depends on the type of prism. If the shapes on the ends are pentagons, the prism has 6 planes of symmetry. If they are hexagons, it has 13 planes of symmetry. It has the same number of planes of symmetry as the shapes on the end have lines of symmetry, plus 1.
Five
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A triangular based pyramid has no lines of symmetry. However, if each of the non-base triangular sides are equal it will have 3 planes of symmetry. If the base triangle is also equal, it will have 6 planes of symmetry.
Three.
3D shapes don't have lines of symmetry they have plane's of symmetry.
five
It has 2 lines of sym
12 lines of symmetry Hope this help u g-spots :P
The question is too ambiguous because, depending on its orientation, the top of a triangular prism can be a triangualar face, a rectangular face or an edge.
It could have just one - a plane (not plan!) parallel to its bases and halfway between them.