Calculate the moment of inertia of a disc about its any diameter ?

Explanation

`l_("disc")=(MR^(2))/(2)` Let `l_(x)` be the moment of inertia about diameter
`l_(z)=l_(y)+l_(x)`
`l_(x)=l_(y)=2l_(x)`
`l_(x)=(l_(z))/(2)=(MR^(2))/(4)`