If cocaine hydrochloride is deprotonated for the amine, what is crak

Crack cocaine is the 'free base' which means the removal of the HCl and therefore the polarity, making it less soluble in polar solvents, less grams per mole and a lower point of vaporisation due to lower inter-molecular forces.

THis also creates more tightly packed molecules leading to smaller space occupation of crystals.

A rectangle has 4 right angles at each corner and you can tell because the angle will be 90 degrees