A tetrahedron, or, a 'triangular based pyramid'
A hexagonal figure have 6 edges
B, 6 faces. it has 8 vertices and 12 edges.
Normally a box will have 12 edges, 6 faces and 8 corners or vertices
A hexagon.
6
A cube has 6 faces. The number of faces, alone, is not sufficient to figure out the number of edges. For example, a cube has 12 edges. A pentagonal pyramid also has 6 faces, but it has 10 edges.
A tetrahedron.
Depends on the environment you're working in: a hexagon is the answer if you're considering a plane, and a tetrahedron (triangular pyramid) if you're using 3d.
A cube or a cuboid would fit the given description of 12 edges and 6 faces.
A tetrahedron is a solid figure with 6 edges. There's no such thing as solid edges. A tetrahedron is a triangular pyramid, with 4 vertices, 6 edges and 4 triangular faces. In a regular tetrahedron (the first Platonic solid) all triangles are equilateral.
It is a hexahedron