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What is the minimum number of vertices that a 3-D element can have?

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in Computational Fluid Dynamics by (118k points)
What is the minimum number of vertices that a 3-D element can have?

(a) 6 vertices

(b) 5 vertices

(c) 3 vertices

(d) 4 vertices

This question was addressed to me during an interview.

My doubt stems from Types of FVM Elements topic in portion Finite Volume Methods of Computational Fluid Dynamics

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Best answer
Right answer is (d) 4 vertices

Best explanation: At least four points are needed to make an element. A tetrahedron is a shape which has the least number of vertices and the least number of faces. It has 4 faces and 4 vertices. A 2-D element can be formed using three vertices.

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