Yes it does. Do you even know what perpendicular means? It means that two sides can keep going but never touch. If you look at a prism depending on what prism it is it should have at least one pair of perpendicular sides.
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A rectangular prism has six faces, and each of them is perpendicular to four others.
Adjacent sides are perpendicular. Opposite sides are parallel.
No sides perpendicular means no right angles. A rhombus is a quadrilateral with no right angles so no sides perpendicular.
The question contradicts itself. A dodecagon need not have any perpendicular sides.
No. a equilateral triangle does not have perpendicular sides.