tetrahedron
Isosceles TetrahedronA solid with four faces is a tetrahedron. Each of the faces is a triangle. If all the triangles are congruent, you have an isosceles tetrahedron.
Rectangles are plane (2-dimensional) polygons. Only solid (3-dimensional) polyhedrons have faces.
tetrahedron
A rectangular pyramid (four-sided base) has 5 faces and 5 vertices.
A solid with four faces for maths is a tetrahedron.
A four-faced solid is called a tetrahedron.
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.
The tetrahedron has only four faces. A sphere has only one, but that's probably not what you meant since the surface of a sphere is curved.
tetrahedron
Isosceles TetrahedronA solid with four faces is a tetrahedron. Each of the faces is a triangle. If all the triangles are congruent, you have an isosceles tetrahedron.
A polyhedron (solid shape formed by plane faces) with four faces is called a tetrahedron.
A cuboid.
A pyramid BK
A square is not a solid figure at all. It's a flat figure, with four congruent faces and four congruent angles.
Four triangular faces.
A tetrahedron, otherwise known as a triangular pyramid, has four faces, four vertices and six edges.