12 faces 20 vertices 30 edges
A prism with 21 edges would have a polygonal base that is a decagon (10 sides). Since a prism consists of two parallel bases and vertical edges connecting corresponding vertices, the total number of edges can be calculated as the sum of the edges of the two bases (10 + 10) and the number of vertical edges (10), resulting in 30 edges. However, since the question specifies 21 edges, this indicates an error, as no standard prism can have 21 edges. A correct example would be a prism with 6 edges (triangular base) or 12 edges (hexagonal base).
A triangular prism has 6 edges and so an octagonal prism will have 16 edges.
By definition, a dodecahedron must have twelve faces. So it must be an decagonal prism. Edges = 30 Faces = 12 Vertices = 20
A triangular prism has 9 edges!
There are 30 edges on a decagonal prism.
30
number of edges of a n-sided (n>2) prism is 3n. In this case, 30.
Vertices: 20 Edges: 30 Faces: 12
Edges = 30 Faces = 12 Vertices = 20
12 faces 20 vertices 30 edges
A prism with 21 edges would have a polygonal base that is a decagon (10 sides). Since a prism consists of two parallel bases and vertical edges connecting corresponding vertices, the total number of edges can be calculated as the sum of the edges of the two bases (10 + 10) and the number of vertical edges (10), resulting in 30 edges. However, since the question specifies 21 edges, this indicates an error, as no standard prism can have 21 edges. A correct example would be a prism with 6 edges (triangular base) or 12 edges (hexagonal base).
A triangular prism has 6 edges and so an octagonal prism will have 16 edges.
A rectangular prism can have 12 edges, but not every shape with 12 edges is a rectangular prism.
3 times the number of sides on each base. 3*10 = 30 edges.
By definition, a dodecahedron must have twelve faces. So it must be an decagonal prism. Edges = 30 Faces = 12 Vertices = 20
A triangular prism has 9 edges!