S side =ch s table =s side +2s bottom v=sh.
The height of the cone is represented by H, the bottom area by S, and the volume by V: v=sh/3.
(3) Cylinder
1, understanding of the cylinder.
The upper and lower surfaces of a cylinder are called the bottom surface. A cylinder has a surface called a side. The distance between the two bottom surfaces of a cylinder is called the height.
Step-by-step method: more materials are actually used than the calculated results. So when you want to keep the number, if the omitted number is 4 or less, you must go forward 1. This approximate method is called step by step method.
2. Calculation formula: S side =ch s table =s side +s bottom× 2 V = SH/3.
(4) Cone
1, understanding of the cone.
The bottom of the cone is a circle, and the side of the cone is a curved surface.
The distance from the apex of the cone to the center of the bottom surface is the height of the cone.
Measuring the height of the cone: firstly, lay the bottom of the cone flat, place a flat plate horizontally above the apex of the cone, and measure the distance between the flat plate and the bottom vertically.
Enlarge the side of the cone to get a sector.
2. Calculation formula: v= sh/3