Q: How many diagonals does an octahedron have?

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An octahedron is a closed 3-d shape with 8 polygonal faces. There are 257 topologically different convex octahedra. The number of diagonals will depend on which one of the 257 octahedra you have in mind.

An octahedron has eight bases/faces.

An octahedron has eight faces. If it has 62 faces then it is not an octahedron!

An octahedron has 7 perpendicular lines.

An octahedron has 8 sides.

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An octahedron is a closed 3-d shape with 8 polygonal faces. There are 257 topologically different convex octahedra. The number of diagonals will depend on which one of the 257 octahedra you have in mind.

An octahedron has 8 sides.

An octahedron has 18 corners.

a octahedron has 8 faces

An octahedron has eight faces - by definition.

In geometry, an octahedron is a polyhedron with eightfaces.

An octahedron has eight bases/faces.

An octahedron has 8 sides.An octahedron is a polyhedron with eight plane faces.

An octahedron has eight faces. If it has 62 faces then it is not an octahedron!

A truncated octahedron has 14 faces.

A truncated octahedron has 24 vertices.

An octahedron has 7 perpendicular lines.