In the grid below, all resistors have the same resistance R. Determine the equivalent resistance between A and B:
REq. HG (Triangle HDG)=REq. GF (Triangle GCF)=2/3
REq. HG (Triangle HDG)+REq. GF (Triangle GCF)=4/3
Removing the junction at E,
RHF=REq. HG (Triangle HDG)+REq. GF (Triangle GCF) (4/3) parallel with RHE+REF (2)=4/5
REq. AB=RAE+REB (2) parallel with RAH+RHF+RFB (14/5)=7/6