HB square=why is there b square +2b square in ans by adding what it comes like this in - Physics - Electrostatic Potential And Capacitance

Question

HB square=why is there b square +2b square in ans???by adding what
it comes like this in ans plzzzz reply experts faast??

Sagar Kumar · Accepted Answer

Dear Student,HB is the diagonal of the cube which is equal toHB2 =HC2 +BC2 ……………(1)     (visualise from the given figure)(using pythagoras theorem)And HC2=HG2+GC2   (see square HGCD) (using pythagoras theorem)From (1)HB2=HG2+GC2+BC2  ( HC2=HG2+GC2)HG=bGC=bBC=bHB2=b2+b2+b2Or, HB2=3b2Or,HB=b3Hope it is clear nowRegards

HB square=why is there b square +2b square in ans???by adding what it comes like this in ans.plzzzz reply experts faast??