Question:
Which of the following will not form a polyhedron?
(a) 3 triangles
(b) 2 triangles and 3 parallelograms
(c) 8 triangles
(d) 1 pentagon and 5 triangles
Solution:
(a) A polyhedron is bounded by more than four polygonal faces. But in case of 3 triangles, it is not possible. So, option (a) does not form a
polyhedron.