An octahedron is a closed 3-d shape with 8 polygonal faces. There are 257 topologically different convex octahedra. They can have faces which are triangles, quadrilaterals, pentagons, hexagons or heptagons.
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As a 2D polygon shape it is an 8 sided octagon.
it is all the 2d shapes with pics
The 2 dimensions of 2d shapes and length and breadth.
The answer depends on what is known about the 2d shapes.The answer depends on what is known about the 2d shapes.The answer depends on what is known about the 2d shapes.The answer depends on what is known about the 2d shapes.
2d forms are flat shapes