Circular sector is a very special geometric form in plane geometry. The following article introduces to you the concept of what a sector is, the formula for calculating the area of a circular sector, ...

Arc length can be calculated with the help of the central angle of that arc and the radius of the circle to which that arc belongs. The unit of the central angle can be in degrees or radians. So, ...

THE usual text-book formula for the radial distance of the centroid of a circular arc of radius r and length 2ra, may be converted into a useful result by expressing the position of the centroid in ...