Question

Derive the moment of inertia of a uniform equilateral triangular lamina about its centroid

Answer 1

Answer:

Moment of inertia of an equilateral triangular lamina ABC, about the axis passing through its centre O and perpendicular to its plane is Io as shown.

Answer 2

The problem is to find the moment of inertia for a solid equilateral triangle about an axis at the triangle's vertex which is perpendicular to the plane of the triangle. Mass is given as M.