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A cylinder is a 3D shape with a circular cross-section and a curved surface. It has no straight edges. To find the volume or surface area of a cylinder, calculate it in the same way you would a prism.

To calculate the surface area of a cylinder: Work out the area of the two circular faces (2 × π\(r\)²). Work out the curved surface area, this is the rectangular face (2π\(r\) × \(h\)).