You could have made it difficult if you had omitted 'in two', which implies symmetrical and identical halves. 

 Shoot, just read this and realised that it makes no difference for a sphere.  https://primal.net/e/note1fgpdhma589puznxd3m462nd8v0kvph03nkfqzugn90rnd5mxs6hqul5s7l 

 I made a mistake interpreting 'in two', but came to realise it is irrelevant.