The name of the platonic solid shown is hexahedron.
What are different types of solids?
Tetrahedron - A tetrahedron, also referred to as a triangle pyramid, is a polyhedron with four triangular faces, six straight edges, and four vertex corners in geometry.
Hexahedron - Any polyhedron with six faces is called a hexahedron.
Octahedron - An octahedron is a polyhedron with eight faces in geometry.
Dodecahedron - In geometry, a dodecahedron or duodecahedron is any polyhedron with twelve flat faces
The figure given in the question has clearly six flat faces and hence according to the definitions it is a hexahedron.
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