there are two plane symmetry on triangular prism.
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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.
3D shapes don't have lines of symmetry they have plane's of symmetry.
The answer is 13- for more detail:
12 lines of symmetry Hope this help u g-spots :P
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