How to find the equivalent resistance of this circuit?

https://postimg.cc/YhYYyz6X

This circuit was formed from a collapsing the 3d circuit cube of all equal resistors into a 2d one. The guy in a youtube video I got it from found the equivalent resistance via the delta wyre method but I havent learnt it yet and was wondering if i could get the same answer using kirchoff's laws.

My working: ((1/2)R+(1/2)R+(2/R))^-1 = (1/3)R total (which is wrong)

Correct ans = (3/4)R

(edited 6 months ago)

Reply 1

mqb2766

Its a bridge circuit so was going to write it all out, but
https://www.youtube.com/watch?app=desktop&v=SOBomZJg8Mc&ab_channel=PhysicsNinja
is decent. Try working it through and if you dont get the ans, post your working.

You should find it is a simple version, as the two resistors in the top line are equal as are the two resisotors in the bottom line. Its the principle behind a wheatstone bridge.