a nonahedron.
A 3 dimensional figure
the 3 dimensional shape is a octagon, because their are 8 sides.
A pyramid
If its 2-dimensional then its an octagon, if it is 3-dimensional then it is called an octahedron.
A cube and a cuboid
octahedron
-1
A polyhedron is a 3-dimensional shape whose faces are all polygons.
edge
A triangular pyramid.
A triangular dipyramid.
A three-dimensional shape with five faces is called a triangular prism. It has two triangular faces and three rectangular faces, connecting the corresponding sides of the triangles. This shape has a total of 5 faces, 9 edges, and 6 vertices.