None. A square triangle is an oxymoron - it cannot exist!
a four faced triangle is called a tetrahedron
Yes.
Pyramid
Gyroelongated square pyramid, It contains 13 faces, 9 vertices and 20 edges. Please, go to the link provided below the answer, to its figure.
An example of a common five faced three dimensional shape is the square pyramid. There are no three dimensional shapes with five edges.
It is a flat faced 4 sided quadrilateral that has 4 vertices.
A kite is a 4 sided quadrilateral with a flat faced surface area
Triangular pyramid. Only 4 faced solid.* * * * *True, it is the only 4 faced solid but the question is about a five faced solid, anyway!However, there is no simply connected solid with the above numbers becasue they do not satisfy the Euler characteristic. This requires that Faces + Vertices (corners) = Edges + 2
A square is a tetragon whereas a tetrahedron is 4 faced pyramid
The 7-faced solid is called a "hexagonal pyramid."
A heptahedron is a polyhedron with 7 faces, and you can make one with 15 edges.