Why can't you use a quick formula to find the surface area of an oblique cylinder?

A quick formula for the surface area of a cylinder typically assumes that the cylinder is right-angled, meaning that its bases are perfectly aligned and perpendicular to its height. In an oblique cylinder, the bases are not aligned in this way, leading to a more complex surface area calculation. The slant height and the angles between the bases and the height must be considered, which requires more detailed geometric analysis than a simple formula can provide.