A pyramid.
A Triangular Pyramid
A pyramid with a triangular base. The faces are 4 equilateral triangles.
A geometric figure with a polygonal base and triangular sides is called a pyramid.
A triangular pyramid has 4 triangular sides. A rectangular pyramid has 2 triangular sides and 3 rectangular sides.
A triangular based pyramid would seem to fit the given description which has 4 equal sided triangular faces, 6 edges and 4 vertices.
Tetrahedron has three sides and a base all triangular.
A square pyramid has a base with 4 equal sides and triangular faces.
A pyramid.
4 sides
It is a tetrahedron, which is defined as a four- sided figure with all triangular sides.
A pyramid with a square base, or a triangular prism.
Four sides ⇒ it is a tetrahedron. More commonly, it is called a triangular pyramid.