Measurement of dijet angular distributions in proton-proton collisions at a center-of-mass energy of 7 TeV. The data sample, collected with single jet triggers, has a total integrated luminosity of 36 pb−1, with jets being reconstructed using the anti-kt clustering algorithm with R=0.5. The data are presented for the variable χ defined as χ=exp(|y1−y2|) where y1 and y2 are the rapidities of the two leading (highest p⊥) jets.'