Question

A uniform triangular plate of mass M whose vertices are ABC has lengths l,
l/√2,l/√2
as shown in
figure. Find the moment of inertia of this plate about an axis passing through point B and
perpendicular
to the plane of the plate.
​

Answer 1

Answer:

               $Ml^{2} /6$

Explanation: As attached in the image this is the triangular plate of mass M and it can be considered as part of a square plate of side l.We can give moment of inertia  as $(Ma^{2}+Mb^{2})/12$.Look out to the attachment.