Rotation - Moment of Inertia of semicircular disc

[cupid.callin]

Homework Statement

I need to find the Moment of Inertia of semicircular disc to do some question.

I have done these kind of questions before (Long time ago:shy:) but for some reason i can't recall how, and even when i moved to my new home, i lost my notes

Please can someone put some light on this

 

[cupid.callin]

Some help Please?