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.
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).
It is a TETRAHEDRON . Incorrectly named a triagular pyramid.