It depends on the exact shape. An octahedron is a shape with eight faces. It can be a heptagonal pyramid (8 vertices, 14 edges), or a hexagonal prism (12 vertices, 18 edges), square dipyramid (6 vertices, 12 edges) are some examples. There are more.
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An octahedron has 8 faces. there are a number of different configurations. A heptagonal pyramid has 14 edges and 8 corners. A hexagonal prism has 18 edges and 12 corners A quadrilateral based dipyramid (two quad based pyramids stuck together) has 12 edges and 6 corners. There are many other possible shapes.
The answer will depend on how many corners have been cut off in the truncation process.
An octahedron has8 faces, 12 to 18 edges and 6 to 12 edges.
An octahedron has eight faces. If it has 62 faces then it is not an octahedron!
12 edges 6 faces 8 corners