Confusion between strips, discs and shells

manpreet Best Answer 3 years ago

My syllabus indicates I must be able to find mean values and centroids of 2 and 3 dimensional figures (equations in cartesian coordinates) using strips, discs and shells as appropriate.

However, I don't know which method (strips, discs and shell method) is which, and I can't seem to find relevant methods on the internet. Could someone explain with little detail each method, and if possible, explain the strips method?

Thank you in advance.