open cylinder
does not include either top or bottom elements, and therefore has surface area (lateral area) L = 2πrh
en-US/ˈoʊpən ˈsɪləndɚ/
en-GB/ˈəʊpən ˈsɪlɪndə/
does not include either top or bottom elements, and therefore has surface area (lateral area) L = 2πrh