Assuming that a solid triangle is a tetrahedron, the answer is: faces: 4 edges: 6 vertices: 4
4 faces/ 4 vertices/ 6 edges
Tetrahedron: 4 equilateral triangle faces and 4 vertices.
Pyràmid
Pyramid
triangle based pyramid
A triangular pyramid has 4 faces, 4 vertices and 6 edgesA triangular pyramid has four vertices, three on the base and one at the top.Vertices are points. Draw a triangle and you will see there are 3 points. Then from each side of the triangle you need to attach another triangle and lift these up so that they come (out of the paper at a point above the middle of the flat triangle). This is another point making a total of 4 points.
Faces: 1 Vertices: 3 Edges: 3
square
A triangular base pyramid which is a tetrahedron has 4 faces, 6 edges and 4 vertices
9 edges/ 6 vertices/ 5 faces
There are only 5 known regular Platonic solids and they and their properties are:- 1 Tetrahedron: (pyramid) 4 equilateral triangle faces, 6 edges and 4 vertices 2 Hexahedron (cube) 6 square faces, 12 edges and 8 vertices 3 Octahedron: 8 equilateral triangle faces, 12 edges and 6 vertices 4 Dodecahedron: 12 regular pentagon faces, 30 edges and 20 vertices 5 Icosahedron: 20 equilateral triangle faces, 30 edges and 12 vertices All of them can be inscribed inside a sphere.