Теорема синуса полным ходом...1)\\\frac{BC}{sinA}=\frac{AC}{sinB}=\frac{AB}{sinC};\frac{BC}{sin76^0}=\frac{8}{sin48^0}=\frac{AB}{sin56^0}\\BC=8*sin76^0:sin48^0\approx11,60\\AB=8*sin56^0:sin48^0\approx8,922)\\\frac{BC}{sinA}=\frac{AC}{sinB}=\frac{AB}{sinC};\frac{BC}{sin17^0}=\frac{AC}{sin54^0}=\frac{12}{sin109^0}\\BC=12*sin17^0:sin109^0\approx3,71\\AC=12*sin54^0:sin109^0\approx10,273)\\\frac{BC}{sinA}=\frac{AC}{sinB}=\frac{AB}{sinC};\frac{9}{sinA}=\frac{8,95}{sin70^0}=\frac{6}{sinC}\\AC^2=BC^2+AB^2-2*BC*AB*cos70^0\\AC\approx8,95\\sinA=9*sin70^0:8,95\approx0,94\\\angle A\approx71\\sinC=6*sin70^0:8,95\approx0,62\\\angle C=39^0