This is probably very simple and I am sure I can hack something together. However, I am looking for an elegant solution to my problem.
I have a hollow circle with, let us say, an outer radius of 47.3 cm and an inner radius of 39.5 cm. Hence, the thickness of the hollow circle is 7.8 cm. Btw, is there a better name than hollow circle?
I would like to know the area of this hollow circle (now problem) minus the area of the maximum number of mini circles that can fit into the hollow circle. Here the mini circles have a radius of 2.5 cm and are snugly placed at the outer circumference of the hollow circle.
I hope I have expressed myself comprehensibly. Thanks a lot.