How does the orientation of hydrogen affect E2 elimination?

[8008jsmith]

Please see the attached picture. I'm not sure which hydrogen would be anti-periplanar. Any help would be appreciated. Thanks!

 

[TeethWhitener]

You're really close. Think about the mechanism of the E2 elimination reaction. Which way does the 2-hydrogen need to be oriented relative to the 1-bromine for the elimination to occur? What does that do to the orientations of the groups in the final product?