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Question

An octahedron has :

A
8 corners
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B
8 faces
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C
8 edges
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D
12 edges
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Solution

The correct options are
B 8 faces
D 12 edges
In geometry, an octahedron (plural: octahedra) is a polyhedron with eight faces. A regular octahedron is a platonic solid composed of eight equilateral triangles, four of which meet at each vertex. A regular octahedron (as shown in the figure) is the dual polyhedron of a cube.
Hence, the correct options are B and D

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