(* pp.480--,#16,22,26,43 *)

(* #16 *)
SideA=10
SideB=12
SideC=16
Angle[A_,B_,C_]:=N[ArcCos[(C^2-A^2-B^2)/(-2A*B)]]*180/Pi
AngleC=Angle[SideA,SideB,SideC]
AngleA=Angle[SideB,SideC,SideA]
AngleB=Angle[SideC,SideA,SideB]
AngleC+AngleB+AngleA

(* #22 *)
AngleA=40
SideB=10
SideC=18
Side[AngleA_,B_,C_]:=N[Sqrt[B^2+C^2-2*B*C*Cos[AngleA*Pi/180]]]
SideA=Side[AngleA,SideB,SideC]
AngleC=Angle[SideA,SideB,SideC]
AngleB=Angle[SideC,SideA,SideB]
AngleC+AngleB+AngleA

(* #26 SSA *)
SideA=10;
AngleC=40;
SideC=8;
AngleA=ArcSin[SideA*Sin[AngleC*Pi/180]/SideC];
AngleA=N[%]*180/Pi
(* second version *)
AngleA=180-AngleA

(* #26 SAS *)
SideB=1.5*625
SideC=2*625
AngleA=170
SideA=Side[AngleA,SideB,SideC]