A dodecahedron.
A dodecahedron.
A dodecahedron.
A dodecahedron.
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That shape is the regular dodecahedron. All those faces are regular pentagons, which means that each side of the polygon is the same length.
A dodecahedron is one of the Platonic Solids which has 12 pentagonal faces, 30 edges and 20 vertices
It is an icosahedron.
Dodecahedron.
Dodecahedrons are a shape with 12 faces, 30 edges and 20 vertices.
According to Euler none; for all 3d shapes: Vertices + Faces = Edges + 2 ⇒ 12 + 8 = 19 + 2 ⇒ 20 = 21 So unless 20 does equal 21, no 3d shape has 8 faces, 19 edges and 12 vertices. Any 3d shape with 8 faces would be an octahedron.