Respuesta :

devishri1977

Answer:

Step-by-step explanation:

∠D = ∠B     {opposite angles of parallelogram are equal}

∠D = 40°

In ΔDCA

∠DCA + ∠D + ∠CAD = 180   {Angle sum property of triangle}

57 + 40 + ∠CAD = 180

       97 + ∠CAD = 180

              ∠CAD= 180 - 97

∠CAD = 83°