As per question,

A =

C =

= (Opposite angles are equal)

3x + x = 50 + 2

4x = 52°

X = 13°

A = (3x – 2)°= 37°

B = 180° - (3x – 2)° = 143°

C = (50 - x)° = 37°

D = 180° - (50 - x)° = 143°

So, Angles of parallelogram is 37°, 143°, 37° and 143°.