A=180-45-60=75度a/sinA=b/sinB2(1+√3)/sin75=b/sin452(1+√3)/[(√6+√2)/4]=b/(√2/2)2(1+√3)/[√2/2*(√3+1)/2]=b/(√2/2)2(1+√3)/[(√3+1)/2]=bb=2(1+√3)/[(√3+1)/2]b=4(1+√3)/(√3+1)b=4S=1/2*absinC=1/2*2(1+√3)*4*√3/2=2(1+√3)*√3=2√3+6