A cylinder has two congruent sides. These are the two circular bases.
A cylinder is a three-dimensional geometric shape with two parallel circular bases connected by a curved surface. Let's break down why it has two congruent sides:
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Circular Bases: A cylinder has two flat, circular faces that are parallel to each other. These faces are the bases of the cylinder. By definition, these two circular bases are congruent, meaning they have the same size and shape.
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Curved Surface: The cylinder also has a curved surface that connects the two bases. This curved surface is not a "side" in the same way as the flat bases. Instead, it's a single continuous surface.
Therefore, focusing on sides that are flat faces, a cylinder has two congruent sides (the two circular bases).