a cylinder
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were two or more faces of a solid figure
Despite the blind answer of many uneducated users of this site, a pentagon is 2 dimensional with 5 SIDES, thus not a solid figure. A pentahedron, though, is a solid figure of five FACES. PENTAHEDRON
Polygonal faces.
A cone
A square is not a solid figure at all. It's a flat figure, with four congruent faces and four congruent angles.