Question

Moment of inertia of equilateral triangular lamina

Answer 1

the moment of inertia of a thin uniform equilateral triangular plate of mass m, edge length l, about an axis passing through its centroid normal to its plane. ... and another way is i can visualize if i consider an identical, triangular plate, at all 3 edges of, this lamina.

Answer 2

$\textbf{Answer is in Attachment !}$