Mensuration

MensurationPrismVolume: (Base area)(Height)Surface Area: 2(base area) + (Perimeter of base area)(Height)CylinderVolume: Closed cylinder:(Base area)(height)= πr2hHollow cylinder:πR2h -πr2h (don’t memorize)PyramidVolume: ⅓(base area)(height)Surface Area: Base area+area of n no. of lateral triangles.*For rectangular pyramids,Surface Area: Base area + area of 2 small triangles + area of 2 big trianglesConeVolume: 1/3πr2hSurface Area: Curved surface area: πrl (l is the slant height)Total surface area:πrl + πr2SphereVolume: Total: 4/3πr3Hemisphere: 2/3πr3Surface Area:Total curved surface area:4πr2Hemisphere curved surface area: 2πr2