3.3.4 Discrete Stokes theorem: Why is the voltage drop around the large triangle equal to the sum of the drops around the small triangles? Note: This is true even if

voltage drops liked, + d, + d6 around triangles like ABC are nonzero. If the voltage law holds and the drop around each small triangle is zero, then the exercise says that d1 + d2 + d3 + d4 + d5 + d6=0.