The moment of inertia in rotational motion is equivalent to:

Three particles, each of mass $m$ are situated at the vertices of an equilateral triangle $ABC$ of side $𝓁$ (as shown in the figure).

The moment of inertia of the system about a line $AX$ perpendicular to $AB$ and in the plane of $ABC$, will be:-

In the rectangular lamina shown in the figure, $AB=\frac{BC}{2}$. The moment of inertia of the lamina is minimum along the axis passing through:-