1. The problem statement, all variables and given/known data I don't quite understand how to read circuit diagrams, so I'm not sure how to find the equivalent resistance in some cases. What is the equivalent resistance of circuits A and B? I drew a picture to help me explain what I'm talking about: 2. Relevant equations 3. The attempt at a solution I know circuit B is definitely in parallel, so the equivalent resistance is 1/R = 1/R1 + 1/R2. But is circuit A in parallel, too? I think it is but I'm not 100 % sure.