Question

Which of these three-dimensional elements has faces as a mixture of two shapes?

(a) Tetrahedron

(b) Prism

(c) Hexahedron

(d) Octahedron

I had been asked this question in quiz.

The origin of the question is Types of FVM Elements topic in section Finite Volume Methods of Computational Fluid Dynamics

Answer 1

The correct answer is:

(b) Prism

A prism is a three-dimensional element that has faces that are a mixture of two shapes, typically consisting of a polygonal base and top (such as triangles or quadrilaterals) with parallelogram faces connecting them. This characteristic distinguishes prisms from other 3D elements like tetrahedrons, hexahedrons, or octahedrons, which have faces of a single shape.