Four triangular faces.
A tetrahedron or triangular pyramid.
A triangular pyramid is a tetrahedron, or a solid three-dimensional figure made up of four triangular 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.
A triangular pyramid has 4 faces and has 6 edges
There is no solid figure with only four edges. The smallest solid figure is the tetrahedron, made up of four triangular faces, but it has six edges.
Tetrahedron.
A solid figure with five faces is called a pyramid. Specifically, a triangular pyramid, or tetrahedron, has four triangular faces, while a square pyramid has one square base and four triangular faces, totaling five. The pyramid's faces meet at a single point called the apex.
The solid figure that has 4 flat surfaces that are triangles is a tetrahedron. A tetrahedron is a polyhedron with four triangular faces, six straight edges, and four vertex corners. Each of the four faces of a tetrahedron is an equilateral triangle, making it a regular polyhedron.
a tetrahedron, an icosahedron or a pyramid
It is a tetrahedron which is a triangular based pyramid having 4 faces, 6 edges and 4 vertices
tetrahedron
A tetrahedron (triangular pyramid).