The cosmic microwave background and observational convergence in the Omega(m)-Omega(Lambda) plane

I use the most recent cosmic microwave background (CMB) anisotropy measurem ents to constrain the leading cold dark matter models in the Omega(m)-Omega (Lambda) plane. A narrow triangular region is preferred. This triangle is e longated in such a way that its intersection with even conservative version s of recent supernovae, cluster mass-to-light ratios, and double radio sour ce constraints is small and provides the current best limits in the Omega(m )-Omega(Lambda) plane: Omega(Lambda) = 0.62 +/- 0.16 and Omega(m) = 0.24 +/ - 0.10. This complementarity between the CMB and other observations rules o ut Omega(Lambda) = 0 models at more than the 99% confidence level.