  We compare reduced three-point correlations $Q$ of matter, haloes (as proxies
for galaxies) and their cross correlations, measured in a total simulated
volume of $\sim100 \ (h^{-1} \text{Gpc})^{3}$, to predictions from leading
order perturbation theory on a large range of scales in configuration space.
Predictions for haloes are based on the non-local bias model, employing linear
($b_1$) and non-linear ($c_2$, $g_2$) bias parameters, which have been
constrained previously from the bispectrum in Fourier space. We also study
predictions from two other bias models, one local ($g_2=0$) and one in which
$c_2$ and $g_2$ are determined by $b_1$ via an approximately universal
relation. Overall, measurements and predictions agree when $Q$ is derived for
triangles with $(r_1r_2r_3)^{1/3} \gtrsim 60 h^{-1}\text{Mpc}$, where $r_{1-3}$
are the sizes of the triangle legs. Predictions for $Q_{matter}$, based on the
linear power spectrum, show significant deviations from the measurements at the
BAO scale (given our small measurement errors), which strongly decrease when
adding a damping term or using the non-linear power spectrum, as expected.
Predictions for $Q_{halo}$ agree best with measurements at large scales when
considering non-local contributions. The universal bias model works well for
haloes and might therefore be also useful for tightening constraints on $b_1$
from $Q$ in galaxy surveys. Such constraints are independent of the amplitude
of matter density fluctuation ($\sigma_8$) and hence break the degeneracy
between $b_1$ and $\sigma_8$, present in galaxy two-point correlations.
