Ah, an octahedron is a beautiful shape with 8 faces. Each face is a triangle, so there are no rectangular faces on an octahedron. Just imagine those lovely triangular faces catching the light and bringing joy to your geometric world.
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An octahedron is a closed 3-d shape with 8 polygonal faces. There are 257 topologically different convex octahedra. Their faces can be triangles, quadrilaterals (including rectangles), pentagons, hexagons or heptagons. The answer depends on which octahedron you have in mind.
Many solids have no rectangular faces, including such forms as the hexagonal pyramid and the regular octahedron.
a octahedron has 8 faces
A truncated octahedron has 14 faces.
An octahedron has 8 sides.An octahedron is a polyhedron with eight plane faces.
Sides and faces are the same thing, and an octahedron has eight.