Question

question 1 of 10
which of the following are not polyhedrons?
check all that apply.
a. cylinder
b. cone
c. prism
d. pyramid

Explanation:

A polyhedron is a solid with flat polygonal faces. A cylinder has curved surfaces (the lateral surface), so it is not a polyhedron. A cone also has a curved surface (the lateral surface), so it is not a polyhedron. A prism has flat polygonal faces (two congruent bases and rectangular lateral faces) and is a polyhedron. A pyramid has flat polygonal faces (a base and triangular lateral faces) and is a polyhedron.

Answer:

A. Cylinder, B. Cone