import math


def get_angle_between_vectors(vector_a, vector_b):
    """Get angle in arc degree between two Vectors.

    :param vector_a: first vector
    :type vector_a: 2d list
    :param vector_b: second vector
    :type vector_b: 2d list
    :rtype: angle in arc degree
    """

    #Equation:
    #A dot B = length(A)*length(B)*cos( angle_between(A, B) )
    temp = vector_a[0]*vector_b[0] + vector_a[1]*vector_b[1]
    length_a = math.sqrt(vector_a[0]*vector_a[0] + vector_a[1]*vector_a[1])
    length_b = math.sqrt(vector_b[0]*vector_b[0] + vector_b[1]*vector_b[1])
    angle = math.acos(temp/(length_a*length_b))
    #Convert angle in arc degree
    angle = (angle * 180) / math.pi
    return angle