Which step in the construction of copying a line segment ensure that the new line segment has the same length as the original line segment

Figure abcd is rotated by 180 degrees about the origin in the counterclockwise direction to obtain figure a′b′c′d′: will give brainliest which statement best compares the lengths of the sides of the two figures? length of ab = length of c′d′ length of cd = length of a′b′ length of cd = length of b′c′ length of ab = length of a′b′