Current location - Training Enrollment Network - Mathematics courses - Part names of fans (urgently needed in math class) What are the part names of fans?
Part names of fans (urgently needed in math class) What are the part names of fans?
The meaning of a sector is a figure surrounded by an arc and two radii passing through both ends of the arc, which is called a sector. Sector is an important figure related to the circle, and its area is related to the central angle (vertex angle) and radius of the circle. The area of a sector with a central angle of n and a radius of r is n/360 * π r 2. If the vertex angle is in radians, it can be simplified. ...