Why is Cubic closed packing called “cubic”?

How is Cubic Closed Packing "cubic" and also how is hexagonal closed packing "hexagonal"?

I have been thinking over this for a few hours but I am unable to visualise.

I understand that when placing the third layer on top of the second layer ,$$2$$ situations arise:
If the third layer is placed on the tetrahedral voids it forms an A-B-A-B... type structure which is called hcp (why?)
and If the third layer is placed on the octahedral voids it forms an A-B-C-A-B-C... type structure which is called ccp (why?)

• HUH?!? BCC has the same packing fraction as FCC $\approx 74\%$ – MaxW Sep 4 '18 at 18:31