That 3D shape is called triangular pyramid.
cube
tetrahedron
The 3D shape that has 6 vertices, 6 faces, and 10 edges is a hexagonal prism. A hexagonal prism is a polyhedron with two hexagonal faces and six rectangular faces connecting them. It has 6 vertices where the edges meet, 6 faces (2 hexagonal and 4 rectangular), and 10 edges that form the boundaries between the faces.
A Triangular based Pyramid has 4 vertices, 6 edges and 4 faces.
retangle
Sphere ( 0 faces , 0 edges , 0 vertices )
# of faces + # of edges + # of vertecies + 2
Sphere
According to Euler none; for all 3d shapes: Vertices + Faces = Edges + 2 ⇒ 12 + 8 = 19 + 2 ⇒ 20 = 21 So unless 20 does equal 21, no 3d shape has 8 faces, 19 edges and 12 vertices. Any 3d shape with 8 faces would be an octahedron.
That 3D shape is called triangular pyramid.
cube
a square
Nonahedron
tetrahedron
corn
cube