A sphere
1
-9
-3
2-D - a hexagon 3-D - a triangular pyramid
A dodecagon. Do = two Deca = ten If you mean a 3-D figure, then it is a dodecahedron.
Vertices are points in a solid, or 3-D figure, where edges meet.
2
... a triangular pyramid. Also known as a tetrahedron.
a polygon(or polyhedron) is a three dimensional figure that has straight edges. * * * * * A polygon is 2 dimensional, a polyhedron is 3-d.
> Assuming the 8 refers to 8 vertices, the answer is a parallelepiped. Actually, any hexahedron topologically similar to a cube has 6 faces, 8 vertices, and 12 edges. A parallelepiped is just one possibility.
square based triangle