A tetrahedron, or, a 'triangular based pyramid'
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Yes exactly so a pyramid has 4 faces, 4 vertices and 6 edges
A tetrahedron.
A trapezium has 4 vertices and 4 edges or sides. It is a two dimensional figure so it has only one "face".
A rhombus is a plane (flat) figure so it has no faces. It has 4 edges and four vertices
2 faces, 4 edges, and 4 vertices 2 faces, 4 edges, and 4 vertices