A triangular prism has three planes of symmetry. Each plane passes through a vertex of the triangular base and divides the prism into two mirror-image halves. Additionally, there is one plane of symmetry that bisects the prism vertically through the midpoint of the triangular bases. This symmetry reflects the prism's geometric properties, making it a balanced shape.
2
It must have at least one.
5
A trapezium prism has one plane of symmetry if the trapezium is isosceles, meaning the non-parallel sides are of equal length. This plane of symmetry bisects the prism vertically through the center, dividing it into two mirrored halves. If the trapezium is not isosceles, it has no planes of symmetry.
A triangular prism has 9 edges!
there are two plane symmetry on triangular prism.
2
It must have at least one.
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
3
Three.
5
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.
The answer is 13- for more detail: