Blade (18) for a turbine (7) of a turbomachine having a cooling zone (ZF) comprising three different types of cooling orifices (25, 26, 27) that are formed through the wall of the airfoil (30) and that are spaced apart from one another radially between the platform (28) and the tip (S), the trailing edge connecting fillet (17) having the overall shape of a dihedral (DI) characterized by the radius (R) of the trailing edge connecting fillet (17) and the spacing (E), opposite the trailing edge (BF), between the pressure-face wall (15) and the suction-face wall (16), and in that the spacing (E) and the radius (R) of the trailing edge connecting fillet (17) change radially between the platform (28) and the tip (S) of the blade (18).
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