How do you perform annulus?

To perform an annulus, typically in a mathematical or geometric context, you define two concentric circles with different radii. The annulus itself is the region between these two circles. To create it, you specify the inner radius ( r_1 ) and outer radius ( r_2 ), and the area can be calculated using the formula ( A = \pi (r_2^2 - r_1^2) ). In practical applications, such as architecture or engineering, you might use this shape to design structures or components that require a hollow ring-like form.