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Measurements of the angles and sides of the unitarity triangle and of therates of rare B meson decays are crucial for the precise determination ofStandard Model parameters and are sensitive to the presence of new physicsparticles in the loop diagrams. In this paper the recent measurements performedin this area by Babar and Belle will be presented. The direct measurement ofthe angle alpha is for the first time as precise as the indirect determination.The precision of the V_ub determination has improved significantly with respectto previous measurement. New limits on B->tau nu decays are presented, as wellas updated measurements on b->s radiative transitions and a new observation ofb->d gamma transition made by Belle.Comment: Talk presented at the Lepton-Photon 2005 Symposium, June 30-July 5,  Uppsala, Sweden. 14 pages, 13 figure

CKM PARAMETERS AND RARE B DECAYS