Question

A ________ is solid bounded only by plane surfaces (faces).

(a) square

(b) rectangle

(c) regular polyhedron

(d) triangle

I had been asked this question in an internship interview.

I want to ask this question from Projections of Solids topic in section Orthographic Projection, Projections of Lines, Planes and Solids of Civil Engineering Drawing

Answer 1

Correct answer is (c) regular polyhedron

Explanation: In geometry, a polyhedron (plural polyhedra or polyhedrons) is a solid in 3 dimensions with flat polygonal faces, straight edges and sharp corners or vertices. The word polyhedron comes from the Classical Greek. A convex polyhedron is the convex hull of finitely many points, not all on the same plane. Cubes and pyramids are examples of convex polyhedra. A polyhedron is a 3-dimensional example of the more general polytope in any number of dimensions.