B) 35
the formula is .5(outer angle - inner angle) = .5(100-30)=.5*70=35
Community property of addition because -6 + 6 would equal zero
Sorry I don't see a picture. But...
If they add up to 90 degrees, they are complimentary
If they add up to 180 degrees ( a straight line) they are supplementary.
If they are vertical, they will be on either side, like two v's ><
