A^2=b^2+c^2-2bc Cos(A) (270)^2=(255)^2+(442.85)^2-2(255)(442.85)Cos(A) A=Cos^(-1)(270^2-255^2_(442.85)^2)/(-2*255*442.85)=33.5435 solve for angle A approximately is 33.54 degrees. sinA/a=SinB/b Sin33.54/270=SinB/255 B=Sin^(-1)(sin33.54/270*255)approximately is 31.45. 180-31.45-33.54=115.01 is Angle C.