A tetrahedron.
Assuming that a solid triangle is a tetrahedron, the answer is: faces: 4 edges: 6 vertices: 4
it has 4 faces and each face is a triangle.
Poy
a 2d triangle has 1 face known as a plane but a triangular prism has 4 faces
Pyràmid
4
its a triangle, circle,
Tetrahedron
a pyramid, in the sense that most people think of has a square base, with 4 triangle 'sides', which would be 5 faces. A regular tetrahedron has 4 equilateral triangles as faces.
A square based pyramid.
a triangle- based pyramid has 4 faces