Theorem of perpendicular axis be applicable to which type of body?

Will the theorem of perpendicular axis be applicable to a solid sphere?

(a) Prove the theorem of perpendicular axes. (Hint : Square of the distance of a point (x, y) in the x-y plane from an axis through the origin perpendicular to the plane is x^(2)+y^(2) ). (b) Prove the theorem of parallel axes. (Hint : If the centre of mass is chosen to be the origin Sigmam_(1)(r_(i)=0) .

State and prove theorem of perpendicular axes.