Find the angles of the parallelogram ABCD if the angle is B = 37 degrees.

Since ABCD is a parallelogram, its opposite angles are equal, that is, the angle B is equal to the angle D is equal to 37, and the angle A is equal to the angle C.
Since ABCD is a parallelogram, AB is parallel to CD, and angle A + angle B = 180 degrees (as one-sided). Then angle A = 180-37 = 143 = angle C.
Answer: angle B = angle D = 37, angle A = angle C = 143