Yes, its called a three sided pyramid
A pyramid
A triangular based pyramid has 4 flat faces, 6 edges and 4 vertices.
It is a pentahedron with a rectangular base and four triangular lateral faces.
The faces are the flat, triangle-shaped surfaces that make up the surface of the pyramid. A pyramid has four faces.
Two shapes with five faces are a triangular prism and a square pyramid. A triangular prism consists of two triangular bases and three rectangular lateral faces, while a square pyramid has a square base and four triangular faces that converge at a single point (the apex). Both shapes exemplify polyhedra with five distinct surfaces.
A triangular pyramid.
A square-based pyramid has five flat surfaces: one square base and four triangular faces that converge at the apex. The base is the square, while each of the four sides of the square forms a triangular face with the apex.
A square base, and four triangular shaped sides equals five flat surfaces.
Trapezium, or triangular pyramid * * * * * A triangular pyramid, yes. But not a trapezium since that does not have four triangular faces.
A triangular pyramid has four triangular faces.
There are four faces in a triangular pyramid.
Each of them has four triangular faces.