एक खोखले वृत्ताकार खंड का, जिसका बाहरी व्यास D और आंतरिक व्यास d है, उसके केंद्रक X-अक्ष के परितः जड़त्व आघूर्ण (moment of inertia) क्या होगा?

According to the parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through its center of gravity IP is given by which of the following expressions? (Where A = area of the section, IG = moment of inertia of the section about an axis passing through its CG, and h = distance between the CG and the parallel axis.)

The axis around which the moment of area is measured is referred to as which of the following?